Optimization of blade pitch angle of an axial turbine used for wave energy conversion

Mohamed, Mohamed H.; Shaaban, S.

doi:10.1016/j.energy.2013.04.035

Cited by 47 publications

(11 citation statements)

References 22 publications

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“…Efforts have been made to increase the performance of the Wells turbine by changing duct geometry [2], designing monoplane and biplane Wells turbine [3], optimizing blade profile and thickness [4], modifying airfoil profile [5e7], making non-symmetric airfoil blade shape [8] and non-uniform tip gap [9], inserting end plate [10], sweeping [11,12], changing blade pitch angle [13,14], etc. 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.…”

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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“…A numerical optimization algorithm is implemented in this work [127]. The present CFD optimization results show that the optimum blade pitch angle for NACA 0021 is 0.3°while that of the optimized blade equals 0.6°.…”

Section: Setting Pitch Angles For Bladementioning

confidence: 95%

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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“…The performance of Wells turbines by blade shape modifications are reported in the literature [7][8][9][10][11][12]. Raghunathan and Tan [9] reported that thicker blades increase the performance of the Wells turbine.…”

Section: Introductionmentioning

confidence: 99%

Torque and efficiency maximization for a wave energy harvesting turbine: an approach to modify multiple design variables

Halder

Samad

2016

Int. J. Energy Res.

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Summary Multiple design variables modifications are carried out for a bidirectional flow turbine used in an oscillating water column wave energy converter to enhance its performance by maximizing the peak torque‐coefficient (TC) and the corresponding efficiency (EFF), which are the objective functions of this problem. The Latin hypercube sampling technique selects samples from a designed space created by the design parameters defined for the blade sweep and aerofoil profile thickness modifications. The objective function values are obtained by solving Reynolds‐averaged Navier–Stokes equations and are approximated by surrogate models. The models help in generating populations of the genetic algorithm, which finally produces a set of optimal designs in a Pareto optimal front. Only two extreme designs among the five clustered points are further evaluated by solving Reynolds‐averaged Navier–Stokes equations to cross‐check the validity of the optimization steps. It is found that the TC is increased by 33% and the EFF is decreased by 5% at one extreme cluster point, while the other extreme point gives that both the TC and the EFF are higher by 1.8% and 2.9%, respectively, as compared with the reference geometry. The optimal geometry has a wider operating range, which is an important parameter to get continuous power from a wave energy converter. Copyright © 2016 John Wiley & Sons, Ltd.

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Optimization of blade pitch angle of an axial turbine used for wave energy conversion

Cited by 47 publications

References 22 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 for wave energy conversion: a review

Torque and efficiency maximization for a wave energy harvesting turbine: an approach to modify multiple design variables

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