空气动力学学报2016，Vol.34Issue(5)：638-645,8.DOI:10.7638/kqdlxxb-2016.0044
消除小展弦比尾舵大舵偏非对称流动现象的方法研究
Investigation on the ways to eliminate the asymmetric flow on low-aspect ratio fins at large angles of pitch
李巍 1李永红 1畅利侠 1史晓军 1杨可 1王晓冰1
作者信息
- 1. 中国空气动力研究与发展中心 高速空气动力研究所，四川 绵阳 621000
- 折叠
摘要
Abstract
It has been clarified in a recent wind tunnel test that the wingtip vortices generated from the leading edges of the pair of fins which is opening along the flow direction begin to interfere each other,and further make the formation of the asymmetric flow in transonic speed as the angle of pitch increases to some extent.The asymmetric flow generates large side force and rolling moment,and brings difficulties to the controllability of the fins.It is necessary to study the way to eliminate the asymmetric flow.This paper presents the changes of the asymmetric flow versus angles of pitch,and investigates the mechanism of the formation of the asymmetric flow based on numerical method.And then two ways to eliminate the asymmetric flow are proposed.The results show that as the angle of pitch is large enough,the interference of the asymmetry of the vortices becomes stronger generally till one of the vortices disappears.It is effective to eliminate the asymmetric flow,either through reducing the root chord length or cutting off the local area around the leading edge,and in the meantime the effectiveness of the fins is close with that of the base fin which has stable wingtip vortex formation.关键词
小展弦比/跨声速/翼尖涡/非对称/舵偏角Key words
low aspect ratio/transonic speed/wing-tip vortex/asymmetry/deflection angle分类
航空航天引用本文复制引用
李巍,李永红,畅利侠,史晓军,杨可,王晓冰..消除小展弦比尾舵大舵偏非对称流动现象的方法研究[J].空气动力学学报,2016,34(5):638-645,8.
