复合式直升机前飞状态旋翼-机翼干扰计算分析

采用自由尾迹算法和涡格法,编制了针对复合式直升机旋翼一机翼升力系统的气动计算程序,对于旋翼和机翼间的气动干扰情况进行了初步分析,计算了不同前飞速度下机翼旋翼之间的相互干扰情况,计 算结果验证了程序的可行性.同时表明:机翼-旋翼间的干扰与速度有较大关系,而机翼对旋翼扭矩的影响大于对旋翼拉力的影响.由于相互干扰的存在,旋翼和机翼的效率都会降低.这为复合式直升机的设计提供了参考和分析工具.

Rotor-wing interaction analysis of a compound helicopter in forward flight

Abstract: The compound helicopter, which is an efficient way to improve the performance of helicopters, has gained more and more attention so far. Employing the free-wake arithmetic and VLM (Vortex Lattice Method), a program for the rotor-wing system of compound helicopter aerodynamic computation has been developed. Using the program, interactions between the rotor and the wing in different advance ratios are computed. From the computation results, some conclusions can be made: For the compound helicopter described in the paper, the influence of wing on the rotor lift is small, but a little bigger on the rotor torque; while the flight speed increasing, the influence of rotor on the wing decreases; and the interaction reduces the efficiency of the rotor and the wing.