直升机涡环状态建模仿真研究  

Modeling and simulation research on helicopters operating in vortex ring state

作　　者：张华[1] 于琦[1] 章海红[1] 

机构地区：[1]中国飞行试验研究院飞机所,陕西西安710089

出　　处：《飞行力学》2013年第2期162-166,共5页Flight Dynamics

摘　　要：涡环对直升机的飞行安全具有很大的危害,直升机在陡下滑机动过程中可能会进入涡环状态。通过对滑流理论的修正,得到了适用于涡环状态的直升机旋翼诱导速度计算模型。以此为基础,进行了直升机涡环状态的实时仿真研究,给出了直升机进入涡环后典型的响应特征。仿真结果与试验/试飞结果具有良好的一致性,说明所建模型准确、可靠。The vortex ring state（VRS） has great potential hazard for helicopters.The helicopter could possibly encounter VRS when operating in steep descent.Based on the analysis of the available references,the momentum theory was modified to develop a VRS model for calculating the mean inflow of a rotor operating in VRS.A real-time simulation of VRS was performed.The simulation results reflected typical helicopter responses during VRS and showed good correlation with the flight test data,and the simulation model has been proved to be accurate and reliable.

关 键 词：直升机 涡环状态 诱导速度 实时仿真 

分 类 号：V212.4[航空宇航科学与技术—航空宇航推进理论与工程]