关键词:
VAWT
wind tunnel experiments
CFD
spanwise direction
pressure distribution
power coefficient
摘要:
The aerodynamic forces and vortex characteristics of an H-type Vertical Axis Wind Turbine(VAWT)become complicated because of dynamic stall,particularly in the three-dimensional impact on the blade spanwise *** study focused on the evaluation of the aerodynamic performance and vortex characteristics of an H-type VAWT in the spanwise direction by numerical simulations and wind tunnel *** acting on the blade surface was obtained from multiport pressure measurement devices by wind ***,the vortex field around different blade sections was investigated through numerical *** stall behavior was analysed by comparing the results of numerical simulations and *** a result,the tangential force of single blade was mainly contributed at the chordwise position of x/c≤0.4 c and the power of single blade was mainly contributed at the azimuthal angle range of 60°≤θ≤150°in the blade section position region of 0≤z/(H/2)≤*** the section position of z/(H/2)=0.5,the initial flow separation was found at the suction side and progressed forward to the leading *** the increase of the tip speed ratios,the decreasing position of the averaged local power coefficient of each section was closer to the middle section of z/(H/2)=0,and the attenuation speed became *** power coefficient reductions at the blade section position of z/(H/2)=0.9 were 38.29%,46.78%and 56.42%when the tip speed ratios were 1.38,2.19 and 2.58,*** results of this study provided a better understanding of the development of the performance characteristics and vortex characteristics of H-type VAWT.