任意迎角二维平板的超声速和高超声速俯仰振动导数

应用频率的摄动法,本文得到了任意迎角二维平板机翼的超声速和高超声速俯仰振动导数。该导数是由包括直到缩减频率的五阶项所组成的。数值结果表明高阶项的贡献在较低马赫数或大迎角情况下是很重要的。作为平均迎角趋于零的特殊情况,本文的数值结果与超声速线化的位流理论是一致的,在高超声速情况与活塞理论一致。

Supersonic/Hypersonic Pitch Oscillating Derivatives of Two Dimensional Flat Plate at Arbitrary Angles of Attack

Using perturbation method of the frequency,supersonic/hypersonic pitch oscillating derivatives of two dimensional flat plate wing at arbitrary angles of attack are obtained,which consist of a series of up to the fifth power of the reduced frequency.Numerical results show that contribution of high order terms are very important at lower Mach number or high angles of attack.Numerical solutions agree with supersonic linearized potential flow theory as a special case when the mean angle of attack tends to zero and with piston theory in hypersonic case.