摘要
动力入流理论把旋翼扰动运动所引起的气动力变化和诱导速度变化直接联系起来,是一种简便而实用的旋翼非定常气动力模型。本文把动力入流模型引入旋翼操纵响应分析,建立了一套计算旋翼操纵力和力矩的分析模型,并在旋翼模型试验台上进行旋翼悬停操纵导数试验。通过试验值与理论值(计入和不计入动力入流)的对比分析,证明了动力入流模型的适用性,初步弄清了不同条件下动力入流的影响程度。本文还用一个简化模型分析了动力入流对不同型式的旋翼(无铰式、根部较柔软的无铰式和铰接式)的影响程度,得出了与传统观点不同的结论。
Dynamic inflow modeling is a simple and practical means of analysing rotor unsteady aerodynamics,associatng the perturbations in lift with the change in induced inflow direct-ly. This paper develops a method accounting for dynamic inflow model to analyse the rotor control response. This method can be used to calculate rotor force rotor moments and con-trol derivatives. Rotor model tests on the rotor model test stand are performed to measure rotor static control derivatives in hover. This paper verifies the dynamic inflow effects and clarifies preliminarily the influence of dynamic inflow through comparison analysis of the measured and the predicted data (with and without dynamic inflow). A simplified method is used to investigate the influence of dynamic inflow on the different rotor configurations, including hingeless rotor and articulated rotor.
基金
航空科学基金
关键词
直升机
空气动力学
旋翼试验
helicopters.unsteady aerodynamics. rotor tests .dynamic inflow .control deriva tive
