涉及身管传热的准一维两相流动及其计算

QUASIONEDIMENSIONAL TWO-PHASE FLOW INVOLVING HEAT TRANSFER AND ITS COMPUTATION

提出了一种用于计算射击过程中火药燃气对身管传热的方法，它是借助在火炮膛内建立的包括气流与身管间传热的不稳定准一维气－固两相流动，还借助在膛壁边界层建立非稳定流而得的有关动量位移厚度的偏微分方程，采用随弹丸运动的半可延伸手风琴式网格，以ＭａｃＣｏｒｍａｃｋ格式进行有限差分计算，由此引起的膛壁温度分布．

This paper presents a method for computing the heat transfer from gas to gun tube. An unsteady quasionedimensional gassolid twophase flow model is developed. A partial differential equation on momentum displacement thickness is derived from unsteady flow in boundary layer. An halfextendible accordion grid followed by projectile is coupled with MacCormack′s finite difference scheme to compute the tube wall temperature profiles.