旋翼实度对悬停效率影响的试验研究

着重就旋翼实度对悬停效率的影响进行了试验研究。首先分析了悬停效率与旋翼实度之间的影响关系，然后介绍了试验研究采用的方法和所取得的试验结果，给出了不同实度时旋翼拉力与总距、悬停效率与总距、悬停效率与拉力系数以及悬停效率与单位桨叶面积拉力系数的关系曲线。对试验结果的分析表明，试验方法合理，结果可靠，可供旋翼设计时参考。

Experimental Investigation of Influence of Rotor Solidity on Hover Efficiency

The rotor solidity is an important parameter in helicopter design. The experimental investigation of the influence of rotor solidity on the figure of merit is conducted on a rotor test stand. Firstly,the relationship between the rotor solidity and the figure of merit is analysed, then, the experimental facilities and the method are described and the test results are presented. Based on the results,the variations of the figure of merit with the collective pitch,the rotor thrust coefficient and the rotor thrust coefficient per unit blade area are emphatically analysed,and the influence of rotor solidity on the figure of merit is pointed out.