Insight analysis of biplane Wells turbine performance

Shaaban, S.

doi:10.1016/j.enconman.2012.02.006

Cited by 32 publications

(21 citation statements)

References 13 publications

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“…Other efforts involve modification of guide vane angle [15e17], bidirectional flow [18], variable chord [19], bi-plane unidirectional blade [20], counter rotating blade [21,22], hysteretic behavior with unsteady flow [23], etc. In a simpler design, the turbine has limited moving elements but a larger separated zone makes the turbine less efficient.…”

Section: Introductionmentioning

confidence: 99%

High performance ocean energy harvesting turbine design–A new casing treatment scheme

Halder

Samad

Kim

et al. 2015

Energy

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Section: Introductionmentioning

confidence: 99%

High performance ocean energy harvesting turbine design–A new casing treatment scheme

Halder

Samad

Kim

et al. 2015

Energy

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“…Good qualitative and quantitative agreement between the measured and the predicted flow and torque coefficients can be observed in Figure . The present numerical model predicts the performance of the biplane Wells turbine with higher accuracy compared with the numerical model of Shaaban . This is because the effect of the tip clearance flow was not considered in the numerical simulation of Shaaban .…”

Section: Validation Of the Numerical Modelmentioning

confidence: 96%

“…where Q is the volume flow rate. Figure 7 shows a comparison between the experimental data of Curran and Gato [13] and the numerical results of the present computational model as well as the numerical results of Shaaban [31]. According to Equations (1-3), the pressure coefficient was chosen as the independent variable in the present work.…”

Section: The Turbine Efficiency (η)mentioning

confidence: 99%

Wells turbine blade profile optimization for better wave energy capture

Shaaban

2017

Int. J. Energy Res.

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Summary Despite the fact that wave energy is available at no cost, it is always desired to harvest the maximum possible amount of this energy. The axial flow air turbines are commonly used with oscillating water column devices as a power take‐off system. The present work introduces a blade profile optimization technique that improves the air turbine performance while considering the complex 3D flow phenomena. This technique produces non‐standard blade profiles from the coordinates of the standard ones. It implements a multi‐objective optimization algorithm in order to define the optimum blade profile. The proposed optimization technique was successfully applied to a biplane Wells turbine in the present work. It produced an optimum blade profile that improves the turbine torque by up to 9.3%, reduces the turbine damping coefficient by 10%, and increases the turbine operating range by 5%. The optimized profile increases the annual average turbine power by up to 3.6% under typical sea conditions. Moreover, new blade profiles were produced from the wind turbine airfoil data and investigated for use with the biplane Wells turbine. The present work showed that two of these profiles could be used with low wave energy seas. Copyright © 2017 John Wiley & Sons, Ltd.

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“…Detailed numerical analysis of biplane W-T performance has been performed in [99]. The downstream rotor curbs the turbine during start up and therefore delays its start up.…”

Section: Multiplane W-tmentioning

confidence: 99%

Wells turbine for wave energy conversion: a review

Shehata

Xiao

Saqr

et al. 2016

Int. J. Energy Res.

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Summary In the past 20 years, the use of wave energy systems has significantly increased, generally depending on the oscillating water column concept. Wells turbine is one of the most efficient oscillating water column technologies. This article provides an updated and a comprehensive account of the state‐of‐the‐art research on Wells turbine. Hence, it draws a roadmap for the contemporary challenges, which may hinder future reliance on such systems in the renewable energy sector. In particular, the article is concerned with the research directions and methodologies, which aim at enhancing the performance and efficiency of Wells turbine. The article also provides a thorough discussion of the use of CFD for performance modeling and design optimization of Wells turbine. It is found that a numerical model using the CFD code can be employed successfully to calculate the performance characteristics of W‐T as well as other experimental and analytical methods. The increase of research papers about CFD, especially in the last 5 years, indicates that there is a trend that considerably depends on the CFD method. Copyright © 2016 John Wiley & Sons, Ltd.

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Insight analysis of biplane Wells turbine performance

Cited by 32 publications

References 13 publications

High performance ocean energy harvesting turbine design–A new casing treatment scheme

High performance ocean energy harvesting turbine design–A new casing treatment scheme

Wells turbine blade profile optimization for better wave energy capture

Wells turbine for wave energy conversion: a review

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