Can a Ducted NACA 4415 Hydrokinetic Turbine Deliver Reliable Power in Low-Velocity Rivers? A Review of CFD Design and Experimental Validation

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Hydrokinetic energy has emerged as an attractive renewable energy option for regions where conventional hydropower is impractical due to insufficient hydraulic head or the absence of large-scale infrastructure. Unlike traditional hydropower plants, hydrokinetic turbines generate electricity directly from the kinetic energy of flowing water without requiring dams or reservoirs. Their relatively simple installation and lower environmental impact make them particularly suitable for decentralized electrification in rural and remote communities. However, extracting meaningful power from low-velocity rivers remains an engineering challenge because reduced flow speeds significantly limit turbine efficiency and energy output.

The reviewed study addresses this challenge by developing and validating a horizontal-axis ducted hydrokinetic turbine equipped with a NACA 4415 airfoil. The research integrates computational fluid dynamics (CFD) simulations with field experiments conducted in a natural river environment to evaluate turbine performance under realistic operating conditions. Rather than relying solely on numerical predictions, the authors experimentally verify rotational speed, torque, power output, and power coefficient, providing valuable evidence regarding the feasibility of diffuser-augmented hydrokinetic turbines for low-flow applications. 

This article is particularly relevant to researchers working in renewable energy engineering, computational fluid dynamics, turbine design, and sustainable rural electrification. By combining engineering design, numerical modeling, fabrication, and experimental validation within a single study, the research contributes practical insights into the optimization of small-scale hydrokinetic energy systems while highlighting the importance of validating CFD predictions through real-world performance testing.

Bibliographic Information

Item Information
Article Title Design, CFD analysis, and experimental validation of a NACA 4415 ducted hydrokinetic turbine for low-velocity river applications
Authors Ma. Leona Maye B. Pepito, Kent B. Ignali, Ian Keanu E. Becoy, Keith John D. Tadifa, and John Kenno P. Lumasag
Journal Innovation in Engineering
Volume & Issue Volume 3, Issue 1
Publication Year 2026
Pages 11–23
DOI https://doi.org/10.58712/ie.v3i1.43
Publisher Researcher and Lecturer Society
ISSN 3047-5473
License Creative Commons Attribution 4.0 International (CC BY 4.0)
Keywords Energy sufficiency and security; hydrokinetic turbine; renewable energy; diffuser-augmented; clean energy

1. Research Background

  • Renewable energy is increasingly essential for sustainable development. Growing concerns over climate change, greenhouse gas emissions, and the depletion of fossil fuel resources have accelerated the search for renewable energy technologies capable of providing reliable and environmentally friendly electricity generation. Hydropower continues to play a major role in the global renewable energy portfolio, yet conventional hydropower systems require substantial hydraulic head and extensive civil infrastructure that are unavailable in many rural regions. 
  • Hydrokinetic turbines offer an alternative for low-head rivers. Unlike conventional hydropower, hydrokinetic systems extract kinetic energy directly from flowing water without constructing dams or reservoirs. Their relatively simple installation and reduced environmental footprint make them attractive for decentralized power generation, particularly in remote communities where electricity access remains limited. However, turbine performance is significantly constrained under low-flow conditions commonly encountered in shallow rivers. 
  • Low river velocities create significant engineering challenges. Rivers with flow velocities below approximately 1.5 m/s provide only limited kinetic energy for conversion into electricity. Conventional hydrokinetic turbine designs therefore tend to produce low rotational speed, reduced torque, and limited power output, restricting their practical deployment in many naturally occurring waterways. Improving energy extraction under these operating conditions has become an important research priority. 
  • The NACA 4415 airfoil has demonstrated promising hydrodynamic characteristics. Previous investigations have shown that the NACA 4415 airfoil provides favorable lift-to-drag characteristics for hydrokinetic applications operating under relatively low Reynolds numbers. Turbines utilizing this airfoil have been reported to achieve higher power coefficients than several symmetrical airfoil configurations, making it an attractive candidate for small-scale hydrokinetic energy systems. 
  • Diffuser-augmented turbines represent another strategy for improving efficiency. Surrounding the rotor with a duct and diffuser can accelerate incoming flow by reducing downstream pressure, increasing mass flow rate through the turbine, and improving energy extraction. Nevertheless, diffuser performance depends heavily on geometric design parameters such as diffuser angle, duct length, and rotor placement, requiring careful optimization before practical implementation. 
  • A major research gap remains in experimental validation. Although numerous studies have evaluated ducted hydrokinetic turbines using computational simulations or laboratory experiments, relatively few have validated CFD predictions through field-scale experiments conducted in natural rivers operating under realistic low-flow conditions. Consequently, uncertainties remain regarding actual turbine performance, mechanical losses, and the reliability of simulation-based predictions. 
  • This study addresses that gap through integrated numerical and experimental investigation. The researchers combine turbine design, CFD simulation, fabrication, and field testing to evaluate a four-bladed NACA 4415 ducted hydrokinetic turbine installed in a natural river with flow velocities ranging from 0.89 to 1.03 m/s. This integrated approach enables direct comparison between theoretical predictions, numerical simulations, and experimental observations, strengthening confidence in the proposed turbine design. 

2. Research Objective

  • To design a horizontal-axis ducted hydrokinetic turbine employing the NACA 4415 airfoil specifically for low-velocity river applications. 
  • To investigate the hydrodynamic performance of the proposed turbine using Computational Fluid Dynamics (CFD) simulations under representative river flow conditions. 
  • To fabricate a full-scale turbine prototype and experimentally evaluate its performance in a natural river environment. 
  • To compare theoretical predictions, CFD simulation results, and field measurements of rotational speed, torque, power output, and power coefficient. 
  • To assess the effectiveness of diffuser augmentation in improving energy extraction from low-flow river systems suitable for decentralized renewable electricity generation. 

3. Why This Research Matters

  • Supports decentralized renewable energy generation. The proposed turbine design demonstrates how low-velocity rivers can contribute to sustainable electricity production in rural and off-grid communities where conventional hydropower infrastructure is not feasible.
  • Bridges simulation and real-world engineering practice. By validating CFD predictions through field experiments, the study provides stronger engineering evidence than simulation-only investigations, increasing confidence in the practical applicability of computational design methods.
  • Advances hydrokinetic turbine optimization. The integration of NACA 4415 blade geometry with diffuser augmentation offers valuable design insights for improving turbine efficiency under low-flow operating conditions.
  • Provides practical guidance for turbine designers. The comparison between theoretical calculations, CFD simulations, and experimental measurements highlights the influence of hydrodynamic losses, mechanical inefficiencies, and operating conditions that must be considered during engineering design.
  • Contributes experimental data to hydrokinetic research. Field-scale validation remains relatively limited within the hydrokinetic turbine literature. The experimental results reported in this study provide useful benchmark data for future numerical model development and turbine optimization.
  • Supports sustainable engineering innovation. The research contributes to the broader development of environmentally friendly renewable energy technologies capable of utilizing naturally flowing rivers without major ecological disturbance or extensive civil infrastructure.

4. Research Methodology

  • Research Design

    The study adopted an engineering design-and-validation approach that integrates computational modeling with experimental verification. Rather than relying solely on numerical simulation, the researchers designed, fabricated, and field-tested a ducted hydrokinetic turbine using the NACA 4415 airfoil. This combined methodology enabled direct comparison among theoretical calculations, CFD predictions, and real-world operating performance, providing a comprehensive assessment of turbine feasibility under low-flow river conditions. 

  • Study Site

    Experimental validation was conducted at the Bobonawan River in Sitio Kalasuyan, Barangay Capihan, Libona, Bukidnon, Philippines. Preliminary site characterization included measurements of river flow velocity using the float method. Multiple measurements indicated water velocities ranging from 0.89 to 1.03 m/s, representing realistic low-velocity conditions targeted by the turbine design. 

  • Turbine Design

    The researchers developed a horizontal-axis hydrokinetic turbine consisting of four blades based on the NACA 4415 airfoil profile. Blade geometry was generated from standardized airfoil coordinates and divided into ten spanwise sections, each defined by chord length, blade twist angle, and relative flow angle. The complete rotor assembly was modeled in SolidWorks before numerical analysis and fabrication. Previous research supporting the selection of the NACA 4415 profile and a four-bladed configuration was considered during the design process because of its favorable lift-to-drag characteristics and improved performance under low-speed flow conditions. 

  • Diffuser and Nacelle Configuration

    To improve energy extraction, the turbine incorporated a Venturi-type diffuser designed to accelerate incoming water flow through pressure reduction. The diffuser housing was designed with an area ratio of 1.6, an inlet angle of 18°, an outlet angle of 9°, and a total housing length of 0.8 m. A modular nacelle consisting of head, body, and tail sections was also developed to simplify maintenance while maintaining watertight operation through threaded connections and rubber O-rings. 

  • Computational Fluid Dynamics (CFD) Simulation

    Hydrodynamic performance was evaluated using the Flow Simulation module of SolidWorks 2022. Steady-state incompressible flow conditions were assumed with water modeled as a Newtonian fluid. The simulations solved the Reynolds-Averaged Navier–Stokes (RANS) equations using the realizable k–ε turbulence model, a widely adopted approach for internal and external flow simulations involving moderate turbulence. The computational domain included the complete turbine assembly, while inlet velocities matched the measured river conditions. A rotating reference frame represented rotor motion, enabling prediction of rotational speed, torque, shaft power, and power coefficient.

  • Mesh Generation and Numerical Validation

    A hybrid tetrahedral mesh with localized refinement around blade surfaces, duct walls, and diffuser regions was employed to improve solution accuracy. The researchers performed a mesh independence study by progressively increasing mesh density until predicted variations in torque and power output remained below five percent. This procedure ensured numerical stability while maintaining computational efficiency. 

  • Prototype Fabrication

    Following numerical optimization, the turbine prototype was manufactured using fiberglass reinforced with epoxy resin for the rotor blades, providing high strength-to-weight ratio and corrosion resistance. Aluminum was selected for the duct, cylinder, and diffuser because of its lightweight properties and durability in aquatic environments. The complete assembly was subsequently installed in the selected river for field evaluation. 

  • Experimental Performance Evaluation

    Field experiments measured rotational speed, torque, electrical power output, and power coefficient under natural river conditions. Experimental results were compared directly with theoretical calculations and CFD predictions to evaluate turbine performance and quantify discrepancies caused by hydrodynamic losses, drivetrain friction, and mechanical inefficiencies. 

  • Measurement Uncertainty Analysis

    The study incorporated uncertainty analysis to evaluate measurement reliability. Estimated uncertainties were approximately ±8% for flow velocity, ±5% for rotational speed, ±7% for torque measurements, and approximately ±10% for calculated power output after error propagation. These uncertainty estimates were considered when comparing theoretical, numerical, and experimental performance. 

5. Key Findings

Four-Bladed Configuration Delivered the Best Overall Performance

CFD simulations comparing three-, four-, five-, six-, and seven-bladed turbine configurations demonstrated that the four-bladed design achieved the best balance between rotational speed and torque. Turbines with fewer blades rotated faster but generated insufficient torque, whereas turbines with additional blades experienced increased flow blockage and viscous losses that reduced overall efficiency. The optimal tip speed ratio predicted through CFD was approximately λ = 3.2, which subsequently became the reference operating condition for experimental validation. 

Experimental Validation Confirmed the Accuracy of CFD Predictions

One of the principal outcomes of the study is the close agreement between numerical simulations and field experiments. At a flow velocity of 1.03 m/s, CFD predicted a shaft power of 62.71 W, while experimental measurements reached 67 W, corresponding to a relative deviation of approximately seven percent. This level of agreement indicates that the CFD model accurately captured the primary hydrodynamic behavior of the ducted turbine under natural operating conditions. 

The Turbine Successfully Generated Electricity Under Low River Velocities

Despite operating in relatively slow-moving water, the developed hydrokinetic turbine produced meaningful electrical output. Experimental measurements showed approximately 46 W at a flow velocity of 0.89 m/s and a maximum output of 67 W at 1.03 m/s. These results demonstrate that appropriately designed ducted hydrokinetic turbines can generate useful electrical power even under low-flow river conditions where conventional hydropower systems are generally unsuitable. 

Diffuser Augmentation Improved Flow Acceleration

The Venturi diffuser effectively accelerated water passing through the rotor by creating a pressure reduction downstream of the turbine. Increased flow velocity resulted in improved rotor rotation and enhanced energy extraction compared with an unducted configuration. The diffuser therefore played an essential role in improving turbine efficiency without requiring additional hydraulic head. 

Power Coefficient Increased with Flow Velocity

Experimental results demonstrated that turbine efficiency improved as river velocity increased. The power coefficient (Cp) increased from approximately 0.23 at 0.89 m/s to approximately 0.32 at 1.03 m/s, confirming the expected relationship between flow velocity and energy extraction capability. The measured values also validated the selected design tip speed ratio for the four-bladed rotor configuration. 

Mechanical Losses Remain an Important Engineering Consideration

Although CFD predictions closely matched experimental power output, noticeable differences remained in measured rotational speed and torque. The authors attributed these discrepancies to bearing friction, drivetrain losses, generator loading, flow non-uniformity, and transient flow effects that were not fully represented in the steady-state CFD model. These findings highlight the importance of experimental validation when developing hydrokinetic turbine systems intended for real-world deployment. 

6. Scientific Contribution

  • Provides one of the few integrated investigations combining CFD simulation with full-scale field validation of a NACA 4415 ducted hydrokinetic turbine operating under natural low-velocity river conditions.
  • Demonstrates the engineering feasibility of diffuser-augmented hydrokinetic turbines for decentralized renewable electricity generation in shallow rivers where conventional hydropower systems cannot be implemented.
  • Identifies the four-bladed NACA 4415 configuration as the optimal rotor design among the blade configurations evaluated, achieving a balanced combination of torque generation and rotational speed.
  • Validates CFD as a reliable engineering design tool by demonstrating close agreement between simulated and experimental turbine performance under real operating conditions.
  • Contributes valuable experimental benchmark data that can support future numerical model calibration and hydrokinetic turbine optimization research.
  • Advances small-scale renewable energy engineering by integrating aerodynamic design principles, computational simulation, prototype fabrication, uncertainty analysis, and experimental validation into a comprehensive engineering workflow.

7. Industrial Implications

  • Supports rural electrification initiatives. The proposed turbine demonstrates practical potential for supplying electricity to off-grid communities located near slow-moving rivers without requiring dams or major civil infrastructure.
  • Provides a practical design framework for hydrokinetic turbine manufacturers. The integration of CFD optimization with field validation offers an engineering methodology that can reduce design uncertainty before commercial deployment.
  • Encourages wider utilization of low-head water resources. Rivers previously considered unsuitable for conventional hydropower may become viable renewable energy sources through diffuser-augmented hydrokinetic technologies.
  • Supports sustainable energy infrastructure development. The turbine's modular design, corrosion-resistant materials, and relatively simple installation make it suitable for decentralized renewable energy systems requiring minimal environmental disturbance.
  • Provides engineering guidance for future turbine optimization. The documented differences between theoretical predictions, CFD simulations, and experimental performance offer valuable information regarding mechanical losses, hydrodynamic effects, and operational factors that should be addressed during subsequent design improvements.
  • Strengthens confidence in digital engineering workflows. The successful validation of computational predictions demonstrates how modern simulation tools can accelerate renewable energy technology development while reducing reliance on extensive prototype iterations.

8. Research Limitations

  • The study was conducted at a single river site. Experimental validation was performed exclusively in the Bobonawan River, Bukidnon, Philippines. Although the selected site adequately represents low-velocity river conditions, the turbine's performance may vary under different hydrological, environmental, and sediment transport conditions. Additional validation across multiple rivers would improve the generalizability of the findings.
  • The CFD model employed steady-state assumptions. The numerical simulations were based on steady-state Reynolds-Averaged Navier–Stokes (RANS) equations with a realizable k–ε turbulence model. Consequently, transient flow phenomena such as turbulence fluctuations, vortex shedding, and rapidly changing river conditions were not explicitly represented, potentially contributing to discrepancies between simulated and measured turbine performance. 
  • Mechanical losses were not fully captured in the numerical model. While CFD accurately predicted overall hydrodynamic behavior, factors such as bearing friction, drivetrain resistance, shaft alignment, generator loading, and other mechanical inefficiencies contributed to differences between numerical predictions and field measurements. These effects became particularly evident when comparing rotational speed and torque. 
  • The experimental operating range was relatively narrow. Performance evaluation was limited to river flow velocities between 0.89 and 1.03 m/s. The turbine's behavior under higher flow velocities, seasonal flooding, extreme weather conditions, or prolonged continuous operation remains outside the scope of the present investigation. 
  • Only one blade profile and diffuser configuration were investigated. The study focused on a four-bladed NACA 4415 rotor combined with a single diffuser geometry. Alternative airfoil profiles, blade numbers, diffuser dimensions, or optimization algorithms were not explored, leaving opportunities for further engineering improvement. 
  • Economic feasibility was beyond the scope of the study. The research concentrated on technical design and performance validation without evaluating manufacturing costs, maintenance expenses, lifecycle economics, payback period, or commercialization potential. These factors are essential for large-scale deployment and should be addressed in future investigations.

9. Future Research Opportunities

  • Evaluate the proposed turbine under a broader range of river conditions, including higher flow velocities, seasonal fluctuations, and varying hydraulic characteristics to determine long-term operational reliability.
  • Investigate alternative airfoil profiles, blade geometries, blade numbers, and diffuser configurations to further improve energy extraction efficiency and power coefficient.
  • Employ transient CFD simulations such as Large Eddy Simulation (LES) or Detached Eddy Simulation (DES) to better capture unsteady hydrodynamic behavior, wake development, and vortex interactions.
  • Incorporate fluid–structure interaction (FSI) analysis to investigate blade deformation, structural stresses, fatigue behavior, and long-term durability under continuous operation.
  • Develop optimization frameworks using artificial intelligence, machine learning, or evolutionary algorithms to automate turbine geometry optimization for specific river conditions.
  • Conduct techno-economic analyses including manufacturing cost, installation requirements, maintenance scheduling, lifecycle assessment, and return on investment to evaluate commercial feasibility.
  • Investigate hybrid renewable energy systems integrating hydrokinetic turbines with solar photovoltaic or battery storage technologies to improve energy reliability for off-grid communities.
  • Assess environmental impacts related to aquatic ecosystems, fish migration, sediment transport, and river ecology to ensure sustainable long-term deployment.
  • Develop smart monitoring systems incorporating Internet of Things (IoT) sensors for real-time performance monitoring, predictive maintenance, and remote operational management.
  • Expand field validation across different countries and river systems to establish standardized performance benchmarks for small-scale hydrokinetic turbine technologies.

10. Potential for Public Policy Citation (Overton)

This study has considerable potential for future citation in public policy documents because it addresses an important challenge in sustainable energy development: generating electricity from naturally flowing rivers without constructing conventional hydropower infrastructure. Governments seeking to expand renewable energy access in rural and geographically isolated communities increasingly require practical engineering solutions that are environmentally responsible, economically feasible, and technically reliable.

The proposed ducted hydrokinetic turbine provides a technically validated approach for decentralized electricity generation using low-velocity rivers. Since the research combines computational engineering with experimental field validation, the findings may serve as valuable technical evidence for agencies responsible for renewable energy planning, rural electrification, sustainable infrastructure development, and climate adaptation strategies.

The study also aligns with broader international policy priorities, including renewable energy deployment, greenhouse gas emission reduction, sustainable infrastructure, and universal energy access. Consequently, it has moderate-to-high potential to be referenced in technical guidelines, engineering standards, renewable energy roadmaps, and infrastructure planning documents prepared by government agencies, international organizations, and development institutions.

Although additional large-scale validation would strengthen policy relevance, the present work establishes an important engineering foundation for integrating hydrokinetic technology into future renewable energy policies aimed at supporting resilient and sustainable rural electrification.

11. Who Should Read This Paper?

  • Renewable energy engineers.
  • Mechanical engineers specializing in fluid machinery.
  • Researchers working in Computational Fluid Dynamics (CFD).
  • Hydropower and hydrokinetic energy researchers.
  • Graduate students in mechanical, civil, and renewable energy engineering.
  • Design engineers developing small-scale turbine technologies.
  • Researchers interested in sustainable rural electrification.
  • Manufacturers of hydrokinetic turbine systems.
  • Government agencies responsible for renewable energy planning.
  • Policy makers developing sustainable energy and climate strategies.
  • Infrastructure planners working on decentralized energy systems.
  • Environmental engineers interested in low-impact renewable energy technologies.

12. Final Thoughts

This study presents a comprehensive engineering investigation into one of the most promising technologies for decentralized renewable energy generation in low-velocity rivers. By integrating turbine design, Computational Fluid Dynamics (CFD), prototype fabrication, and experimental field validation, the authors move beyond theoretical analysis to demonstrate the practical feasibility of a ducted hydrokinetic turbine employing the NACA 4415 airfoil under realistic operating conditions. Such an integrated approach significantly strengthens the reliability of the reported findings and provides valuable engineering evidence for future hydrokinetic turbine development.

A major strength of the research lies in its balanced comparison of theoretical calculations, numerical simulations, and experimental measurements. Rather than treating CFD as a standalone predictive tool, the authors carefully evaluate its accuracy through field validation, revealing both its predictive capability and its limitations in representing mechanical losses and real-world operating conditions. The close agreement between simulated and measured power output demonstrates that modern computational methods can effectively support renewable energy engineering while emphasizing the continued importance of experimental verification.

The study also makes a meaningful contribution to hydrokinetic turbine design by demonstrating the effectiveness of combining a four-bladed NACA 4415 rotor with diffuser augmentation to improve energy extraction in slow-moving rivers. The measured maximum power output of 67 W and experimental power coefficient of approximately 0.32 confirm that appropriately optimized hydrokinetic systems can provide practical electricity generation even where conventional hydropower is technically impractical. These findings contribute valuable benchmark data for future turbine optimization and CFD model development. :contentReference[oaicite:4]{index=4}

From a broader engineering perspective, this research illustrates how advances in computational modeling, material selection, prototype manufacturing, and experimental validation can be integrated to accelerate renewable energy innovation. While additional investigations involving different river environments, turbine geometries, and economic analyses remain necessary, the present work establishes a solid scientific foundation for future hydrokinetic energy systems capable of supporting sustainable rural electrification and environmentally responsible energy development.

13. Suggested Citations

UNP–Teknomekanik Style

Pepito, M. L. M. B., Ignali, K. B., Becoy, I. K. E., Tadifa, K. J. D., & Lumasag, J. K. P. (2026). Design, CFD analysis, and experimental validation of a NACA 4415 ducted hydrokinetic turbine for low-velocity river applications. Innovation in Engineering, 3(1), 11–23. https://doi.org/10.58712/ie.v3i1.43

APA (7th Edition)

Pepito, M. L. M. B., Ignali, K. B., Becoy, I. K. E., Tadifa, K. J. D., & Lumasag, J. K. P. (2026). Design, CFD analysis, and experimental validation of a NACA 4415 ducted hydrokinetic turbine for low-velocity river applications. Innovation in Engineering, 3(1), 11–23. https://doi.org/10.58712/ie.v3i1.43

IEEE Style

M. L. M. B. Pepito, K. B. Ignali, I. K. E. Becoy, K. J. D. Tadifa, and J. K. P. Lumasag, "Design, CFD analysis, and experimental validation of a NACA 4415 ducted hydrokinetic turbine for low-velocity river applications," Innovation in Engineering, vol. 3, no. 1, pp. 11–23, 2026, doi: 10.58712/ie.v3i1.43.

Harvard Style

Pepito, M.L.M.B., Ignali, K.B., Becoy, I.K.E., Tadifa, K.J.D. and Lumasag, J.K.P., 2026. Design, CFD analysis, and experimental validation of a NACA 4415 ducted hydrokinetic turbine for low-velocity river applications. Innovation in Engineering, 3(1), pp.11–23. Available at: https://doi.org/10.58712/ie.v3i1.43.

Vancouver Style

Pepito MLMB, Ignali KB, Becoy IKE, Tadifa KJD, Lumasag JKP. Design, CFD analysis, and experimental validation of a NACA 4415 ducted hydrokinetic turbine for low-velocity river applications. Innovation in Engineering. 2026;3(1):11–23. doi:10.58712/ie.v3i1.43.

Chicago (Author–Date)

Pepito, Ma. Leona Maye B., Kent B. Ignali, Ian Keanu E. Becoy, Keith John D. Tadifa, and John Kenno P. Lumasag. 2026. "Design, CFD Analysis, and Experimental Validation of a NACA 4415 Ducted Hydrokinetic Turbine for Low-Velocity River Applications." Innovation in Engineering 3 (1): 11–23. https://doi.org/10.58712/ie.v3i1.43.

MLA (9th Edition)

Pepito, Ma. Leona Maye B., et al. "Design, CFD Analysis, and Experimental Validation of a NACA 4415 Ducted Hydrokinetic Turbine for Low-Velocity River Applications." Innovation in Engineering, vol. 3, no. 1, 2026, pp. 11–23. Crossref, https://doi.org/10.58712/ie.v3i1.43.

14. Editorial Note

This article has been independently reviewed for the Engineering Research Insights blog based exclusively on the published research article and its official bibliographic metadata. The purpose of this review is to provide an objective scholarly overview of the study's research background, methodology, principal findings, scientific contribution, engineering significance, and potential practical applications. It is intended to assist researchers, students, engineers, and policy makers in quickly understanding the technical value of the original publication while encouraging readers to consult the complete article for comprehensive methodological details and experimental evidence.

15. SEO Meta Description

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16. SEO Keywords

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17. Recommended URL Slug

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Article Review Summary

This review examines the development and validation of a diffuser-augmented hydrokinetic turbine utilizing the NACA 4415 airfoil for electricity generation in low-velocity rivers. The study combines computational fluid dynamics (CFD), engineering design, prototype fabrication, and experimental field testing to evaluate turbine performance under realistic operating conditions. Experimental results demonstrate a maximum power output of 67 W at a river velocity of 1.03 m/s, with a corresponding power coefficient of approximately 0.32, confirming the effectiveness of the proposed four-bladed ducted configuration. The close agreement between CFD predictions and field measurements highlights the reliability of computational modeling for turbine development while emphasizing the importance of experimental validation in renewable energy engineering. Overall, the research provides a valuable contribution to hydrokinetic technology by offering practical design insights for decentralized renewable energy generation in shallow, low-flow rivers.

Engineering Research Insights
Independent Scholarly Review Series for Engineering Research
This review is intended for educational and scientific communication purposes and is based solely on the original published research article.

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