自转旋翼式陆空车辆跳飞性能计算

Calculation of Jump Takeoff Performance for a Land-and-air Vehicle with an Auto-rotating Rotor

陆空车辆采用自转旋翼提供升力,尾部螺旋桨提供水平推进力的飞行方案,研究该型陆空车辆跳跃式起飞时的旋翼气动特性和飞行动力学特性,为设计具有垂直起降或者超短距起降的陆空车辆提供理论支持和分析计算方法.针对重型陆空车辆的自转旋翼提出了传统预旋结合高速储能飞轮的复合式跳飞方案,采用叶素理论分析自转旋翼桨叶的气动特性,采用数值积分对跳飞性能进行了研究,研究结果对比国内外文献,表明这种新型的复合式方法对跳飞的性能提高明显.

In a land-and-air vehicle, an auto-rotating rotoris often used to providethe lift, and a tail propeller is employed to produce the horizontal propulsion. Research on itsrotor aerodynamics and the flight dynamics of the vehicle will be benefit to find some theoretical supports and analytical calculation methods for designing the vehicles with the functions of vertical and ultra-short take-off and landing. In the light of a heavy land-and-air vehicle with an auto-rotating rotor, a compound scheme of combining a traditional pre-whirl function with a high speed energy storageflywheel is proposed for its jump takeoff analysis. By means oftheblade element theory, the aerodynamic features of its blades in the rotary wings are analyzed, and the jump takeoff characteristics of the vehicle are studied based on the numerical integration algorithm. Comparing with the domestic and foreign literatures, the new plan significantly improves the vehicle performancein jump takeoff.