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Cited 16 time in webofscience Cited 17 time in scopus
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Transient simulation of OWC impulse turbine based on fully passive flow-driving model

Authors
Liu, ZhenCui, YingXu, ChuanliShi, HongdaKim, Kilwon
Issue Date
3월-2018
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Keywords
Wave energy; Oscillating water column; Impulse turbine; Fully passive flow-driving numerical model; Sinusoidal velocity inlet-condition; Unsteady pneumatic performance
Citation
RENEWABLE ENERGY, v.117, pp 459 - 473
Pages
15
Journal Title
RENEWABLE ENERGY
Volume
117
Start Page
459
End Page
473
URI
https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/475
DOI
10.1016/j.renene.2017.10.095
ISSN
0960-1481
Abstract
The rapid development of air turbines for oscillating-water-column wave energy conversion proposes a crucial demand for deep understanding of its unsteady performance in the reciprocating air flow condition. A 3D unsteady numerical model is presented in this study, which is established on the platform of commercial computational fluid dynamics (CFD) software ANSYS-Fluent 12.0. The passive rotation of turbine rotor is fully driven by the bi-directional air-flows following the Newton's second law. The numerical model is validated by experimental results within the grid independency and time-step sensitivity studies. The 3D overall pneumatic characteristics in a stable wave cycle are presented to demonstrate the unsteady performance of the turbine rotor. Effects of air-flow velocity amplitude and rotor's moment of inertia on the flow field and pressure distribution on the blades, pneumatic torque and rotation speed, and the transient input and torque coefficients are studied. (C) 2017 Elsevier Ltd. All rights reserved.
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