TY - JOUR
TI - Novel energy coefficient used to predict efflux velocity of tidal current turbine
AU - Wang, Shuguang
AU - Lam, Wei-Haur
AU - Cui, Yonggang
AU - Zhang, Tianming
AU - Jiang, Jinxin
AU - Sun, Chong
AU - Guo, Jianhua
AU - Ma, Yanbo
AU - Hamill, Gerard
T2 - Energy
AB - The efflux velocity is the basis for the prediction of turbine wake. A novel energy coefficient is defined to propose a new theoretical equation to predict the efflux velocity of tidal current turbine in this paper. Several CFD cases with different tip speed ratio and solidity is conducted using the DES-SA model. In order to overcome the limitations of the axial momentum theory, the effects of tip speed ratio and solidity on the efflux velocity are studied and the energy coefficients with different tip speed ratio and solidity are determined using the proposed equation based on the CFD results. Several semi-empirical efflux velocity equations are finally proposed by fitting the equation of the energy coefficient with tip speed ratio. The application of these equations in the prediction of wake flow and the power calculation of tidal turbine are also introduced in this paper.
DA - 2018/09/01/
PY - 2018
DO - 10.1016/j.energy.2018.06.032
DP - ScienceDirect
VL - 158
SP - 730
EP - 745
J2 - Energy
SN - 0360-5442
UR - http://www.sciencedirect.com/science/article/pii/S0360544218310910
Y2 - 2018/06/29/T16:12:38Z
KW - Efflux velocity
KW - Energy coefficent
KW - Tidal-current turbine
KW - Wake
ER -