基于时间推进自由尾迹方法的俯仰状态旋翼尾迹和入流特性计算  

Computation on Rotor Wake and Inflow Characteristics for Pitching Flight Based on Time-marching Free Vortex Method

作　　者：李春华[1] 陈平剑[1] 

机构地区：[1]中国直升机设计研究所,江西景德镇333001

出　　处：《航空计算技术》2008年第4期18-22,共5页Aeronautical Computing Technique

基　　金：重点实验室基金项目(060C4006)

摘　　要：推导了旋翼俯仰运动时的桨叶挥舞运动方程,给出了桨叶升力面模型和尾迹时间推进预测-校正算法,并结合涡核模型和旋翼配平分析模型,建立了一个时间推进旋翼自由尾迹计算方法。通过计算的旋翼入流值与实验值的对比,验证了计算方法的有效性,利用该方法,计算了旋翼在俯仰运动时尾迹几何形状的畸变特点,并分析了俯仰运动时旋翼的入流特性。A new time- marching free vortex method was developed for predicting rotor wake geometries and inflow distributions. To consider rotor pitching motion, the blade flapping equation was re- derived. Also, the blade lift- surfacing model, the wake time- marching algorithm, the vortex core model and the trimming model were including in the free vortex method. By the comparisons of calculated results with experimental results for numerical example on rotor inflow, the present time- marching free vortex method was validated. Using the method, the distortion characteristics of rotor wake geometries for pitching flight were calculated, and the rotor inflow characteristics in pitching flight were also analyzed.

关 键 词：自由尾迹 旋翼 俯仰 入流 时间推进 

分 类 号：V211.44[航空宇航科学与技术—航空宇航推进理论与工程]