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本文叙述组合体超音速无粘流场的一种数值计算方法,跨越流场内部的间断面采用MacCormack二步显式差分格式(下称内间断“捕捉法”),在物面边界上混合使用两种计算方法。文中还论述了MacCormack二步格式的“异步”程序设计,对于低存贮量的计算机,可成倍提高计算速度。本文方法适用于钝锥、钝多锥,幂次体及钝锥-柱-裙组合体等轴对称物体,也可推广于身部非对称体的计算。大量计算表明,该方法简便、省机时、结果可靠、适用性强。
In this paper, a numerical method for calculating the supersonic viscous flow field is presented. The MacCormack two-step explicit difference scheme (hereinafter referred to as the “interception” trap method) is used across the discontinuity inside the flow field to mix the boundary of the object Two methods of calculation. The article also discusses the MacCormack two-step format “asynchronous” program design, for low storage capacity of the computer, can double the computational speed. The method proposed in this paper is suitable for the isometric symmetry objects such as blunt cone, blunt cone, power body and blunt cone-column-skirt combination. It can also be generalized to the calculation of body asymmetry. A large number of calculations show that the method is simple, saving time, the results are reliable and applicability.