BIONIC SHARK FIN COMBINED AIRFOIL BLADE OPTIMAL DESIGN AND NUMERICAL SIMULATION OF HORIZONTAL AXIS TIDAL CURRENT TURBINE

Abstract A global search optimization system is applied to the design of a horizontal axis tidal current turbine with shroud. 11 design parameters of the turbine blade and 4 design parameters of the shroud casing are considered for the optimization using a genetic algorithm. In order to reduce the simulation cost, a neural network is applied as the meta-model of the RANS (Reynolds-averaged Navier–Stokes) equation solver. Multi-objectives of the power coefficient at different tip speed ratios are applied to cover a wide operating range of the turbine. The CFD (Computational fluid dynamics) for optimization is validated experimentally for the case of a baseline design, and an optimum design is proposed. In this paper, a static structural analysis has been performed, and its robustness is confirmed under several operating conditions. Furthermore, internal flow of the optimized turbine is discussed in detail. It is found that the optimized blade generates a swirling flow and suppresses flow separation at the diffuser wall. The wide angle of the diffuser successfully achieves a high pressure recovery ratio and results in a high level of suction at the inlet of the turbine. It is found that the high-performance tidal turbine is possible to design if both the blade and the shroud diffuser are optimized at the same time.

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Optimization Methodology Of Small Scale Horizontal Axis Shrouded Tidal Current Turbine

2019 IEEE Asia-Pacific Conference on Computer Science and Data Engineering (CSDE) ◽

10.1109/csde48274.2019.9162407 ◽

2019 ◽

Author(s):

In Cheol Kim ◽

Ali Alkhabbaz ◽

HyunTae Jeong ◽

Young Ho Lee

Keyword(s):

Tidal Current ◽

Horizontal Axis ◽

Small Scale ◽

Optimization Methodology ◽

Tidal Current Turbine ◽

Current Turbine

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Design and test of a 600-kW horizontal-axis tidal current turbine

Energy ◽

10.1016/j.energy.2019.05.154 ◽

2019 ◽

Vol 182 ◽

pp. 177-186 ◽

Cited By ~ 5

Author(s):

Yangjian Li ◽

Hongwei Liu ◽

Yonggang Lin ◽

Wei Li ◽

Yajing Gu

Keyword(s):

Tidal Current ◽

Horizontal Axis ◽

Tidal Current Turbine ◽

Current Turbine

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Equations used to predict the velocity distribution within a wake from a horizontal-axis tidal-current turbine

Ocean Engineering ◽

10.1016/j.oceaneng.2014.01.005 ◽

2014 ◽

Vol 79 ◽

pp. 35-42 ◽

Cited By ~ 16

Author(s):

Wei-Haur Lam ◽

Long Chen

Keyword(s):

Velocity Distribution ◽

Tidal Current ◽

Horizontal Axis ◽

Tidal Current Turbine ◽

Current Turbine

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Experiments on the hydrodynamic performance of horizontal axis tidal current turbine and desalination of sea water

International Journal of Energy Research ◽

10.1002/er.3442 ◽

2015 ◽

Vol 40 (5) ◽

pp. 600-609 ◽

Cited By ~ 4

Author(s):

Guang Zhao ◽

Xiaohui Su ◽

Yao Cao ◽

Juncong Su ◽

Yan Liu

Keyword(s):

Tidal Current ◽

Sea Water ◽

Horizontal Axis ◽

Hydrodynamic Performance ◽

Tidal Current Turbine ◽

Current Turbine

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3-D Simulation of Vertical-Axial Tidal Current Turbine

Polish Maritime Research ◽

10.1515/pomr-2016-0072 ◽

2016 ◽

Vol 23 (4) ◽

pp. 73-83 ◽

Cited By ~ 1

Author(s):

Zhang Zhiyang ◽

Ma Yong ◽

Jiang Jin ◽

Liu Weixing ◽

Ma Qingwei

Keyword(s):

Numerical Simulation ◽

Tidal Current ◽

Simple Structure ◽

Hydrodynamic Performance ◽

Control Technique ◽

Fluid Field ◽

Improve Accuracy ◽

Tidal Current Turbine ◽

Current Turbine ◽

Dynamics Method

Abstract Vertical-axial tidal current turbine is the key for the energy converter, which has the advantages of simple structure, adaptability to flow and uncomplex convection device. It has become the hot point for research and application recently. At present, the study on the hydrodynamic performance of vertical-axial tidal current turbine is almost on 2-D numerical simulation, without the consideration of 3-D effect. CFD (Computational Fluid Dynamics) method and blade optimal control technique are used to improve accuracy in the prediction of tidal current turbine hydrodynamic performance. Numerical simulation of vertical-axial tidal current turbine is validated. Fixed and variable deflection angle turbine are comparatively studied to analysis the influence of 3-D effect and the character of fluid field and pressure field. The method, put the plate on the end of blade, of reduce the energy loss caused by 3-D effect is proposed. The 3-D CFD numerical model of vertical-axial tidal current turbine hydrodynamic performance in this study may provide theoretical, methodical and technical reference for the optimal design of turbine.

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