发汗冷却系统的控制及其特性  

Control of Transpiration Cooling System and Its Characteristics

作　　者：徐燕侯[1] 杨学实 

机构地区：[1]中国科学技术大学

出　　处：《应用数学和力学》1993年第11期993-1001,共9页Applied Mathematics and Mechanics

基　　金：国家自然科学基金资助项目

摘　　要：本文给出热层三维发汗冷却控制系统的数学模型.在一般情形下,它是一个可变域上分布参数和集中参数混合的非线性控制系统.本文指出:在冷却剂渗流是一维不可压缩的(或一维定常的)条件下,热层的传热和烧蚀问题可以单独求解.针对热防护层的表面烧蚀问题,本文讨论了系统控制方案,阐明简化的条件,研究了一维发汗冷却系统点控制的特性,给出了冷却剂无相变和有相变两种情形的平衡状态解.This paper gives the mathematical model of three-dimensional transpiration cooling control system in heat shield. Generally it's nonlinear control system on variable-domain mixed up with both distributed and concentrated parameters. This paper points out that the thermal and ablative problems of the shield can be solved solely with the coolant flow only under one-dimensional incompressible or steady condition. In regard to the surface ablating problem of the thermal shield, the control schemes of the system, including its simplified condition and the characteristics of one-dimensional point control is suggested here. Solutions of the equilibrium state are given with or without phase change as far as the coolant is concerned.

关 键 词：传热 蒸发冷却 控制系统 冷却剂 

分 类 号：TK124[动力工程及工程热物理—工程热物理]