三维任意机身的跨音速全位势流计算

 <正> 准确、有效地估计旋成体或任意截面机身在有迎角、有侧滑情形下的跨音速绕流特性,对飞机机身、导弹等外形设计有重要意义。已趋成熟的全位势流计算方法在翼型、单独机翼及翼身组合体绕流中得到广泛应用,并产生了诸如Holst的TWINGn和TAIR,Jameson的FLO系列等实用程序;但对旋成体有迎角绕流或单独机身的全位势绕流计算在文献中还很少见到。现采用守恒型全位势方程、代数法生成的贴体坐标网格和Holst的AF2高效差分方法对旋成体或单独机身有迎角、有侧滑时的跨音速绕流进行研究;并给出分析机身跨音速特性的计算程序是很有必要的。

THE CALCULATION OF TRANSONIC FULL-POTENTIAL FLOWFIELD ABOUT 3-D FUSELAGE

An highly efficient computer program for analysis of 3-D transonic conservative full-potential flowfields about axisymmetric and asymmetric fuselage configurations at nonzero incidence and nonzero sideslip has been developed according to Hoist's highly efficient algorithm of finite difference method. The nearly orthogonal bodyfitted C-O type and H-O type grids, obtained by algebraic method, are used in the computation. Calculations were performed for hemisphere-cylinder, ogive-cylinder and noncircular sectional fuselage with its canopy and the results obtained agree very well with available data of experiments and other theories. It is shown that the present method can be applied not only to subsonic free streams (Ma<1) but also to supersonic free streams (Ma), and so it covers the calculations of all the range of transonic free streams.