升力物体跨音速面积律

应用匹配渐近展开法推导出有升力物体的跨音速非线性面积律,给出升力效应当量源应满足的守恒条件及其确定方法。计算结果表明,对于~般飞机及其部件能较准确地估算其在跨音速流中零升力和有升力时的压差阻力,并可在飞机基本设计点状态下进行阻力优化而选择最佳构型。该方法延伸到低超音速情况亦具有足够准确度。计算方法简单、快速。

TRANSONIC AREA RULE ABOUT LIFTING CONFIGURATIONS

This paper develops the nonlinear area ruling method applied to lifting configurations by using the matched asymptotic expansion and gives the conservational condition under which the integral strength of the equivalent sources- depending on the lift distribution is equal to zero. This conservational condition can be used to determine the corrective quantities of the above mentioned equivalent sources in the region of trailing edge of the wing. The computed results show that the method is capable of accurately predicting the transonic wave drag for general airplanes or their components which have zero lift or lift and providing optimal option for the low-cost wave drag configurations and the method has enough accuracy when applied up to both Ma∞ = 1.5 and α= 10°?.