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提出了一种自转旋翼机跳飞的旋翼叶素诱导速度随时间和径向站位的分布规律的分析方法.基于叶素理论和动量理论,建立总距突增时旋翼瞬态拉力和动态诱导速度的响应模型,通过NACA试验验证模型有效性.将响应模型引入考虑地面效应的自转旋翼机跳飞动力学模型,以总距突增和地面效应在跳飞中作用时间的起始点作为动力学模型数值求解的分段点求解方程.使用动力学模型对试验样机的跳飞性能进行仿真,并试验验证模型准确度.利用跳飞模型计算出试验样机跳飞中旋翼叶素诱导速度并分析其分布规律.结果表明某站位处诱导速度与时间的关系先呈线性后呈抛物线,某时刻诱导速度与径向站位近似呈线性.
A method to analyze the distribution of rotor blade valence inducing velocity over time and radial stations is proposed. Based on the theory of valence element and momentum theory, the transient tension and dynamic induction of rotor rotor are established when total distance suddenly increases Speed response model to verify the effectiveness of the model through NACA test.The response model is introduced into the jerk model of the rotorcraft considering the ground effect and the starting point of the total flight time and the ground effect on the flight time is taken as the dynamics The numerical solution of the model point-by-point solving equation.Using the dynamic model to simulate the jumping performance of the test prototype, and test to verify the model accuracy.Using the jump model to calculate the jump speed of the test prototype rotor viperin induced speed and analysis The results show that the relationship between induction velocity and time in a station is first linear and parabolic, and the induction velocity is approximately linear with the radial station at a certain moment.