Investigation of duct augmented system effect on the overall performance of straight blade Darrieus hydrokinetic turbine

Tunio, Intizar Ali; Shah, Madad Ali; Hussain, Tanweer; Harijan, Khanji; Mirjat, Nayyar Hussain; Memon, Abdul Hameed

doi:10.1016/j.renene.2020.02.012

Cited by 33 publications

(7 citation statements)

References 44 publications

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“…Experimental results have been reported at a wind speed of 5.07 m/s. The numerical results are within the ±20% error range and more realistic than Howel et al results at higher TSRs (reproduced with permission from Siddiqui, Renewable Energy, published by ELSEVIER, 2021 [73]), (e) power coefficient comparison between the computational and experimental results by Robert et al (reproduced with permission from Joo, Energy, published by ELSEVIER, 2015 [34]), (f) comparison of the dynamic torque coefficient at tip speed ratio λ = 3.1 (Castelli et al [65]) (reproduced with permission from Su, Applied Energy, published by ELSEVIER, 2020 [38]), and (g) computational model validation with published experimental data at different values of TSR (reproduced with permission from Tunio, Renewable Energy, published by ELSEVIER, 2020 [82]).…”

Section: Assessment Of Discrepancies In Darrieus Power Coefficientmentioning

confidence: 99%

A Critical Review of CFD Modeling Approaches for Darrieus Turbines: Assessing Discrepancies in Power Coefficient Estimation and Wake Vortex Development

Fertahi,

Belhadad,

Kanna

et al. 2023

Fluids

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This critical review delves into the impact of Computational Fluid Dynamics (CFD) modeling techniques, specifically 2D, 2.5D, and 3D simulations, on the performance and vortex dynamics of Darrieus turbines. The central aim is to dissect the disparities apparent in numerical outcomes derived from these simulation methodologies when assessing the power coefficient (Cp) within a defined velocity ratio (λ) range. The examination delves into the prevalent turbulence models shaping Cp values, and offers insightful visual aids to expound upon their influence. Furthermore, the review underscores the predominant rationale behind the adoption of 2D CFD modeling, attributed to its computationally efficient nature vis-à-vis the more intricate 2.5D or 3D approaches, particularly when gauging the turbine’s performance within the designated λ realm. Moreover, the study meticulously curates a compendium of findings from an expansive collection of over 250 published articles. These findings encapsulate the evolution of pivotal parameters, including Cp, moment coefficient (Cm), lift coefficient (Cl), and drag coefficient (Cd), as well as the intricate portrayal of velocity contours, pressure distributions, vorticity patterns, turbulent kinetic energy dynamics, streamlines, and Q-criterion analyses of vorticity. An additional focal point of the review revolves around the discernment of executing 2D parametric investigations to optimize Darrieus turbine efficacy. This practice persists despite the emergence of turbulent flow structures induced by geometric modifications. Notably, the limitations inherent to the 2D methodology are vividly exemplified through compelling CFD contour representations interspersed throughout the review. Vitally, the review underscores that gauging the accuracy and validation of CFD models based solely on the comparison of Cp values against experimental data falls short. Instead, the validation of CFD models rests on time-averaged Cp values, thereby underscoring the need to account for the intricate vortex patterns in the turbine’s wake—a facet that diverges significantly between 2D and 3D simulations. In a bid to showcase the extant disparities in CFD modeling of Darrieus turbine behavior and facilitate the selection of the most judicious CFD modeling approach, the review diligently presents and appraises outcomes from diverse research endeavors published across esteemed scientific journals.

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Section: Assessment Of Discrepancies In Darrieus Power Coefficientmentioning

confidence: 99%

A Critical Review of CFD Modeling Approaches for Darrieus Turbines: Assessing Discrepancies in Power Coefficient Estimation and Wake Vortex Development

Fertahi,

Belhadad,

Kanna

et al. 2023

Fluids

View full text Add to dashboard Cite

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“…In this section, the twist angle is zero and the blades are completely straight, and the number of turbine blades is three. For the hydrofoil, NACA 4-digit (XYZW) airfoils is chosen as they can be parameterized and also this type of airfoil has been used frequently in previous works for tidal turbines [29][30][31][32]. In this series, X is maximum camber, Y is camber position, and ZW is the value of thickness.…”

Section: Initial Design Cfd Modelling and Validationmentioning

confidence: 99%

Optimization of the hydrodynamic performance of a vertical Axis tidal (VAT) turbine using CFD-Taguchi approach

Khanjanpour

2020

Energy Conversion and Management

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“…Since the Darrieus turbine is suitable for converting the kinetic energy of free stream flow, the application is narrow due to the poor self-starting characteristics and lack of structural analysis [6]. Tunio et al, [7] proved that by using the duct augmented system, the hydrokinetic Darrieus turbine performance increased significantly since the flow increased; then, a Darrieus water turbine performance can increase by using a blocking plate upstream of the rotor [8]. Then, Lust et al, [9] investigated three blades Darrieus water turbine with setup conditions has waves and concluded the rotor degraded power production slightly compared to the current without the waves.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Darrieus Water Turbine Two Blade Different Configuration and Hybrid Turbine for Application of an Irrigation Flow

Sahim

Ilyas

Nurhadi

et al. 2022

ARFMTS

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Rice fields are areas that have irrigation and rarely have lighting; this is dangerous at night because wild animals such as snakes are difficult to see. Irrigation has low-scale water energy with low-head conditions; hence the Darrieus and Savonius type water turbines are considered suitable for this condition. However, until now, there has been no comprehensive study of the feasibility of the two turbines for irrigation flow. Hence this study presents the experimental work to explore the performances of the Darrieus turbines Two Blade Different Configuration and hybrid Darrieus-Savonius turbine for irrigation flow. Accordingly, four configurations of the water turbines used in these investigations, i.e., Darrieus turbine with two different blades shape the aerofoil of NACA 0016 and NACA 0020, single Darrieus turbine with the aerofoil NACA 0016, single Savonius turbine, and hybrid Darrieus-Savonius turbine with the aerofoil NACA 0016. The mechanical power of the water turbines was measured using a rope brake dynamometer. The results show that the single Darrieus turbine with the aerofoil NACA 0016 has higher tip speed ratios but a lower torque coefficient than the single Savonius turbine. Then, hybrid Darrieus-Savonius turbine with the aerofoil NACA 0016, the maximum power coefficient lower than other. Furthermore, the single Savonius turbine has the highest power coefficient than the other. And the single Darrieus turbine with the aerofoil NACA 0016 shows that the turbine has higher torque than others. Thus, based on the results, a single Darrieus turbine with the aerofoil NACA 0016 is recommended for application.

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Investigation of duct augmented system effect on the overall performance of straight blade Darrieus hydrokinetic turbine

Cited by 33 publications

References 44 publications

A Critical Review of CFD Modeling Approaches for Darrieus Turbines: Assessing Discrepancies in Power Coefficient Estimation and Wake Vortex Development

A Critical Review of CFD Modeling Approaches for Darrieus Turbines: Assessing Discrepancies in Power Coefficient Estimation and Wake Vortex Development

Optimization of the hydrodynamic performance of a vertical Axis tidal (VAT) turbine using CFD-Taguchi approach

Experimental Study of Darrieus Water Turbine Two Blade Different Configuration and Hybrid Turbine for Application of an Irrigation Flow

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