关键词: 垂直轴风轮, 阻力型支撑杆, 气动特性, V形截面, 数值模拟

Abstract: In order to study the influences of resistance type support rods on the self-starting capabilities and wind energy utilizations of vertical axis wind wheels, the aerodynamic characteristics of resistance type support rods were analyzed and the relative velocity distributions in downwind and upwind zones were obtained. Then the average output torques of the circular cross-sections, V-shaped convex cross-sections and V-shaped concave circular cross-sections were compared theoretically respectively , which shows that the vertical axis wind wheels that use the resistance type support rods with the V-shaped concave circular cross-sections have the self-starting capabilities and high wind energy utilizations. In order to further verify the above results, the average output torques of the circular cross-sections, V-shaped convex cross-sections and V-shaped concave circular cross-sections in the different speeds were calculated by the numerical simulation method respectively. The simulation results show that the supporting rods which use the V-shaped concave circular sections may improve the self-starting capabilities of vertical axis wind wheels compared with the traditional circular cross-sections, and the wind energy utilizations are increased by 3.44%, which are consistent with the theoretical analysis results.

Key words: vertical axis wind wheel, resistance type support rod, aerodynamic characteristics, V-shaped cross-section, numerical simulation