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针对e N方法中的鞍点法(SPM),结合内波理论,提出了一种简便算法.并用该算法计算了一个由平板、圆锥、圆柱3部分组成的模型以马赫数为10的速度在高度位于30~45km之间、攻角为0°和10°的工况下N值分布情况.结果表明:高度的增加会使转捩位置向下游移动,转捩面积会变小甚至消失;与攻角为0°相比,攻角为10°会使迎风的平板部分转捩发生的可能性增大,转捩面积也会变大;对于背风处的圆锥部分,攻角为10°却会减弱转捩发生可能性,使得转捩面积变小,甚至消失,而且转捩位置也会变化.
Aiming at the saddle point method (SPM) and the internal wave theory in eN method, a simple algorithm is proposed, and a model consisting of flat plate, cone and cylinder with a Mach number of 10 at a height Which is located between 30 and 45km and the angle of attack is 0 ° and 10 ° .The results show that the increase of height will cause the position of the transition to move downstream and the area of the transition will become smaller or even disappear. Angle of 0 ° compared to the angle of attack of 10 ° will make the windward part of the flat plate is more likely to turn around, turning area will become larger; for the leeward part of the cone, the angle of attack of 10 ° will be weakened The possibility of a transition causes the area of the transition to become smaller or even disappear, and the location of the transition will change.