桨叶变形对旋翼气动性能的影响分析

The Influence Analysis of the Blade Distortion to the Rotor Aerodynamic Performances

针对某型机桨叶出现大面积变形情况,本文通过计算评估,分析了其在旋翼气动性能方面的影响。首先采用三坐标测量仪测量了变形桨叶的外形数据,并与理论外形进行了对比,然后用Euler方程加附面层修正方法,计算了二维翼型气动性能的变化情况,进而采用二阶升力线方法分析桨叶变形对旋翼性能的影响,得到了一些有价值的结论。

For the large area distortion problem occurring on the blade of certain type helicopter,the influence on the aerodynamic performances is analyzed,by calculating and evaluating.First,the shape data of the blade is measured by the three coordinate scale instrument,compared to the academic shape.Then the aerodynamic performances change of the 2D aerofoil is computed by Euler equation and near-wall layer.The second order lift line method is used to analyze the rotor performance,some estimable conclusion is obtained.