Computed effects of the number of guide vanes on performance of impulse turbine for OWC system

CUI Ying; LIU Zhen; JIN Jiyuan; SHI Hongda

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Computed effects of the number of guide vanes on performance of impulse turbine for OWC system

CUI Ying 1 #,LIU Zhen 2 *,JIN Jiyuan 3,SHI Hongda 4

1.College of Engineering, Ocean University of China, Qingdao 266100

2.Shandong Provincial Key Laboratory of Ocean Engineering, Qingdao 266100

3. College of Engineering, Ocean University of China, Qingdao 266100

4.Korea Institute of Ocean Science and Technology, Daejon 305-343

*Correspondence author

#Submitted by

Subject:

Funding: NSFC Grant （No.No. 51279190 and 51311140259）, Research Fund for the Doctoral Program of Higher Education of China（No.No.20100132110012）

Opened online:31 December 2013

Accepted by: none

Citation: CUI Ying,LIU Zhen,JIN Jiyuan.Computed effects of the number of guide vanes on performance of impulse turbine for OWC system[OL]. [31 December 2013] http://en.paper.edu.cn/en_releasepaper/content/4576014

The impulse turbine, as an important component for the second energy conversion of Oscillating Water Column (OWC) wave energy converter, is capable of converting low pressure pneumatic energy into mechanical shaft power in the con-dition of bi-directional flow. As is presented in the previous reports, the effects of guide vanes and rotor geometries, tip clearance and hub-to-tip radio have been investigated with both experimental method and numerical analysis, excepting the effects of the number of guide vanes. The present paper aims to benchmark the numerical simulation results with the experimental data and to explore the effects of the number of guide vanes on performance of impulse turbine with fixed guide vanes for structure optimization with the application of three-dimensional Computational Fluid Dynamics (CFD) analysis. In this work, Gambit 2.4 and Fluent 14.5 are employed to build 3-D models of the turbine with different numbers of guide vanes. As a result, the coherence between computed and experimental data is satisfactory, and the turbine with 30 guide vanes is predicted to obtain a higher efficiency.

Keywords:Harbor, Coastal and Offshore Engineering; Impulse Turbine; OWC; Number of Guide Vanes; Numerical Simulation; CFD

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