空气动力学学报2017，Vol.35Issue(2)：177-185,9.DOI:10.7638/kqdlxxb-2016.0059
民用运输机着陆构型纵向失速特性改善研究
Study on improvement of longitudinal stalling characteristics in landing configuration of civil transport aircraft
刘岳锋 1段卓毅 1刘南 2陈迎春 3李亚林 3鲁岱晓3
作者信息
- 1. 中航工业第一飞机设计研究院, 陕西 西安 710089
- 2. 西北工业大学, 陕西 西安 710072
- 3. 上海飞机设计研究院, 上海 200232
- 折叠
摘要
Abstract
In order to improve the longitudinal stalling characteristics of landing configuration, a certain large civil transport aircraft was investigated by computational mothed based on CFD tools and grid generation technique.The computational method was validated by wind tunnel results.The whole aircraft was divided in seven parts, which are the fuselage, inboard wing, middle wing, outboard wing, wingtip, nacelle, and horizontal tail.The results show that the contribution of the inboard and middle wing is negative to the inflexion of pitch moment curve.The stalling characteristics can be improved by worsening the aerodynamic characteristics of the inboard and middle wing, but this worsening procedure decreases the maximum lift coefficient and stalling angle of attack.At high angle of attack and low coming flow speed, there are massive separations in upper surface of the wingtip.The contribution of these separations is positive to the inflexion of pitch moment curve.The leading edge of modified wingtip may induce strong vortex, which can restrain the production and development of massive separation, therefore, the longitudinal stalling characteristics are improved.However, the cruise induced drag is increased due to the modification.A balanced choice needs to be executed for low and high incoming flow speed.The contribution of the horizontal tail is positive to the longitudinal stalling characteristics.The influence of the root vortex of inboard flap is extremely significant on local flow around the horizontal tail.By cowling modification, this influence can be restrained, and the angle of attack increases by 4° for the inflexion of pitch moment curve.关键词
增升装置/失速特性/俯仰力矩/内翼段/中翼段/翼梢小翼/平尾Key words
high-lift system/stalling characteristics/pitch moment/inboard wing/middle wing/wingtip/horizontal tail分类
航空航天引用本文复制引用
刘岳锋,段卓毅,刘南,陈迎春,李亚林,鲁岱晓..民用运输机着陆构型纵向失速特性改善研究[J].空气动力学学报,2017,35(2):177-185,9.
