弹性变形对前掠翼气动特性的影响分析

针对弹性变形对前掠翼气动特性的影响,基于改进的CFD/CSD松耦合静气动弹性数值计算方法,在高亚声速条件下,对前掠角χ=10°,20°,30°的前掠翼纵向气动特性和副翼操纵效率进行了计算和分析。结果表明,迎角较小时,弹性翼的升力、升阻比和俯仰力矩较刚性翼大,大迎角时恰恰相反;随着前掠角的增加,机翼的弯扭变形和气动参数变化的程度愈加剧烈;在最大升阻比、迎角α=4°、副翼偏转角δ=20°时,弹性翼的副翼操纵效率略大于刚性翼。该研究可为前掠翼布局的设计提供借鉴。

Analysis of elastic deformation influence on aerodynamic characteristics forward swept wing

In view of the influence of elastic deformation on the aerodynamic characteristics of the forward swept wing,based on the improved CFD/CSD loose coupling static aeroelasticity numerical calculation method,the longitudinal aerodynamic characteristics and manipulation efficiency of the wing whose forward swept angle x =10°,20°,30° were calculated and analyzed under high subsonic conditions.The results indicated that,with small attack angle,the lift,lift to drag ratio and pitching moment of the elastic wing are larger than the rigid wing,and when the attack angle becomes larger,the phenomenon are just opposite.With the increase of the forward swept angle,the bending and twist deformation and the variation degree of the aerodynamic parameters for the wing are more intense;when the maximum lift resistance ratio attack angle α =4°,aileron turn angle δ =20°,the aileron manipulation efficiency of the elastic wing is slightly larger than the rigid wing.The study can provide reference for the design of forward swept wing layout.