ASYMPTOTIC EXPANSIONS OF TRANSONIC FLOW ABOUT THIN AIRFOIL AND WING WITH BLUNT NOSE
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摘要: 本文利用渐近展开匹配法分析钝头翼型的跨音速绕流,导出了描述前缘附近流动的一级近似、二级近似下的速位方程、边界条件及相应的近似解析解,并构成关于翼表面速度的一致有效合成解,消除了跨音速小扰动近似的前缘奇性,对于大展弦比后掠翼绕流,可利用翼型绕流分析结果,消除机翼前缘奇性。Abstract: Matched asymptotic expansions are used in the analyses of transonic flow about thin airfoils and wings with blunt nose in this paper. The potential equations and boundary conditions for first and second approximations, which represent, the flow near the leading edge, are derived and the corresponding analytical solutions are developed. The composite solutions for the velocity on the surface are constructed, and the singularities of TSD approximation at the leading edge are removed.
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Key words:
- airfoils /
- wings /
- transonic flow /
- perturbation method
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