高速飞行器流场和固体结构温度场一体化计算新方法的初步研究

Study on an integrated algorithm for the flowfields of high speed vehicles and the heat transfer in solid structures

本文探索和研究了一种不需作流/固耦合迭代的一体化计算方法,通过将气体流动和固体结构传热用统一的方程组进行描述,并用统一的方法进行求解,避免了流/固之间的耦合迭代问题。为了验证该数值方法的可靠性,本文对高焓高超声速气流绕二维不锈钢圆管的流动、气动加热以及结构热响应问题进行了计算,结果与实验符合良好。

In this paper a new type of transit function is introduced in the interface where gas and solid are separated, and the equation governing the heat transfer in the volume element across the wall is obtained. Based on it the differential equations governing the mass, momentum and energy transfers of both gas flowfield and solid structure can be put into a unified forms and be solved by an integrated algorithm, which eliminates the necessity of making coupled iterations between the simulations of gas flowfields and solid heat transfer. The numerical simulation of Mach 6.47 flow over a three inch diameter stainless steel cylinder shows good agreement with measured values. Thus the integrated algorithm proves to be efficient and reliable.