Numerical study of aerodynamic performance of a high solidity H-type wind turbine

SHI Pei-li， SHAO Xue-ming
（State Key Laboratory of Fluid Power Transmission and Control， Zhejiang University， Hangzhou 310027， China）

Abstract： Aiming at the problems of aerodynamic characteristics and the wind farm arrangement issues of the high solidity H-type wind turbine under different numbers of blades，the k-ω SST turbulent model was investigated. After analysis of aerodynamic characteristics around the turbine，the relationship between the flow and the performance of the turbine was established. A method was presented to consider the efficiency and bearing security when designed. The turbines arrangement was evaluated on the analysis of the wake flow field. The results indicate that the performance of the turbine is mainly dependent on the performance of the blade in the upstream（[θ]=90°nearby）. Figures show that，with the increasing of the blade numbers，the flow becomes complicated and decreases the pressure difference of inside and outside of blade，so that it makes the power decrease. The distance of the wake field flow velocity recovery to the inlet velocity decreases 28.1% with the blade number enhanced，which provides the references for the arrangement of wind turbines.
Key words： H-type wind turbine； aerodynamic performance； blade numbers； numerical simulation