摘要
Abstract
Analysis and research of the typical Schweizer 269 helicopter lfight into the vortex ring state during auto-rotation in this paper. According to the aerodynamics ,vortex ring formation mechanism of the helicopter has been introduced in this paper, while based on the classic Gao-Xin criterion method, calculated the vortex ring boundary of Schweizer 269 helicopter, and verify the results in lfight use this type of helicopter, after a comprehensive analysis and ultimately determine vortex ring boundary of the type helicopter, for special situation lfight training of the type helicopter to provide technical support in the future.关键词
涡环/直升机/试飞验证/自转下滑Key words
Vortex-Ring/helicopter/lfight test/autorotative glide分类
航空航天
