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为了克服传统S型风轮扭矩波动大的缺点,提出了一种偏转180°螺旋式S型风轮,在低速风洞进行风洞气动性能试验.风轮的旋转直径420mm、高度680mm、偏心距100mm,测量了风轮在风速5m/s不同相位角对应的静扭矩以及风速10m/s不同负载下的转速与扭矩.通过对实验数据分析得出:螺旋式S型风轮始终产生促使转动的正的扭矩,叶尖损失造成静扭矩不随相位角恒定分布,但是静扭矩波动较小;风轮转速波动幅度随着尖速比的增大而减小,扭矩波动幅度随着尖速比的增大而减小;风轮扭矩系数是尖速比的一次函数且随着尖速比增大而减小,功率系数是尖速比的二次函数且截距为零,功率系数随着尖速比增大先增大后减小.
In order to overcome the shortcoming of large torque fluctuation of traditional S-type wind turbine, a deflection 180 ° helical S-shaped wind turbine is proposed to test the aerodynamic performance of wind tunnel in low-speed wind tunnel with diameter of 420mm, height of 680mm, eccentricity 100mm, measured the rotor at a wind speed of 5m / s different phase angle corresponding to the static torque and wind speed 10m / s under different loads of speed and torque through the experimental data analysis shows that: spiral S-type wind wheel always produce to promote the rotation The positive torque and tip loss caused the static torque not to be constant with the phase angle, but the static torque fluctuated less. The fluctuation of rotor speed decreased with the increase of the tip speed ratio. The torque fluctuation range increased with the tip speed ratio The rotor torque coefficient is a linear function of the tip speed ratio and decreases as the tip speed ratio increases. The power coefficient is a quadratic function of the tip speed ratio and the intercept is zero. The power coefficient increases with the tip speed First increase and then decrease than increase.