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Numerical and experimental study on 30kW-class impulse turbine for wave energy conversion

Authors
Kim, K.Yang, S.-K.Hong, K.Hyun, B.-S.
Issue Date
2018
Publisher
International Society of Offshore and Polar Engineers
Keywords
Experimental study; Impulse turbine; Numerical; OWC; Ring-type; Wave energy; Wave simulator
Citation
Proceedings of the International Offshore and Polar Engineering Conference, v.2018-June, pp 665 - 670
Pages
6
Journal Title
Proceedings of the International Offshore and Polar Engineering Conference
Volume
2018-June
Start Page
665
End Page
670
URI
https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/8450
ISSN
1098-6189
Abstract
The present study deals with the design of the optimum impulse turbine for 30kW-class Oscillating Water Column (OWC) wave energy converter. The diameter of turbine was determined to be 0.8m through conceptual design process. For the basic design, the numerical analysis tool was established based on the commercial CFD code, FLUENT. The conventional-type impulse turbine was designed by optimizing the design parameters such as number of blade, angle of guide vane, hub ratio and tip clearance. The numerical results was validated with experiment performed using a specially-built reciprocating flow generator to simulate the wave movement inside OWC. The ring-type impulse turbine for better efficiency was then proposed in order to reduce the vortex roll-up near the tip of rotor blade. The depth of penetration, thickness and length of ring were key parameters investigated in the present study. It was found that a ring-type turbine shows approximately 7% higher in peak efficiency than that of a conventional-type turbine. Copyright ? 2018 by the International Society of Offshore and Polar Engineers (ISOPE)
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