密切曲面锥导乘波体的设计与理论分析

Design and Theoretical Analysis of Osculating Curve Cone Derived Wave-Rider

将密切锥导乘波体技术应用于一般曲面锥流场,以期获得升阻比、容积率更高的密切曲面锥导乘波体。首先,设定不同乘波体后缘激波型线,在两种代表性曲面锥流场内,生成了四种乘波体构型,利用数值方法验证乘波体设计方法可行性;然后构造了三类典型单一控制变量的曲面锥流场,对比分析了对应密切曲面锥导乘波体性能变化规律。研究表明:(1)密切曲面锥导乘波体流面压力分布、后缘激波型线与理论设计吻合,关键位置压力与理论值相对偏差约1%,说明利用密切技术在曲面锥流场中“截取”乘波体的方法是可行的。(2)曲面锥流场控制参数不同,可获得升阻系数、容积率、压缩量增加,升阻比降低的乘波体,也可获得升阻比、容积率增加,升阻系数降低的乘波体。

In this paper,the osculating flowfield method was extended into general curve cone flow-field expects to get waveriders with higher lift to drag ratio and plot ratio.Under different constraint conditions of as⁃sumed shock trace(AST),four typical wave-rider configurations were obtained in two typical curve cone flowfield.The feasibility verification and effectiveness analysis of this method have been studied by numerical ways.Three kinds of single parameter varying curve cone flow-field were constructed to analysis the performance varia⁃tion law of osculating curve cone derived(OCC)wave-rider.The results showed that:(1)The pressure contours of wave-rider configurations at compression surface and exit plane,the assumed shock trace(AST)derived from MOC theory and numerical simulation were in good agreement with each other,and the pressure deviation could be controlled within 1%.(2)While the curve cone flow-field parameters were varying,wave-riders with in⁃creased in lift and drag coefficient,plot ratio,compression,and with decreased in lift to drag ratio could be de⁃rived.Also,wave-riders with increased in lift to drag ratio,plot ratio,and with decreased in lift and drag coeffi⁃cient could be derived.