旋成体超声速底压特性的并行数值研究*
Parallel Numerical Investigation of the Supersonic Base Pressure Feature of an Axisymmetric Body
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摘要: 作用在超声速飞行器底部的压强对飞行器设计具有十分重要的意义,因为它可能提供飞行器总阻力的一半以上。目前,底压数据的来源主要还是依靠实验。而风洞实验时支杆的存在又增加了底阻估算的困难。本文用隐式有限体积法求解轴对称NS方程,在PVM平台下数值模拟超声速底部流场,根据底压分布计算出了底压系数。分析了网格密度,支杆直径对底压系数的影响,网格足够密时,计算结果与实验吻合较好。Abstract: The pressure acting on the base of a body moving at supersonic flow may be of considerable practical importance in a vehicle design since it can provide a base drag amounting to more than one-half of the total drag of the vehicle.Presently the base pressu