低散热发动机对流散热场的数值分析  

A Numerical Simulation for Heat Convection in Cooling Passage of Low Heat Rejection Engine

作　　者：朱松林[1] 陆瑞松[1] 

机构地区：[1]武汉交通科技大学

出　　处：《内燃机学报》1996年第3期235-240,共6页Transactions of Csice

摘　　要：本文利用在非交错网格上求解非正交曲线上标系下的Ｎ－Ｓ方程的方法，对低散热发动机对流散热场进行了数值模拟，得到了不同瑞利（Ｒａｙｌｅｉｇｈ）数下的散热通道内流场和温度场的数值解。计算结果表明，通过冷却通道中空气自然对流换热方式所散失的热量很小。Natural convectiQn of the cooling passage of low heat rejection engine (LHRE) is investigatednumerically and the distributions of velocity, temperature and local Nusselt number of cylinderline are given. The governing equations are written for a nonorthogonal coordinate system andnonstaggered grids are used. The numerical results show that the air in the LHRE cooling passagerejects only a small quantity of heat from cylinder line by means of convection, so it takes heat insulation effect.

关 键 词：低散热发动机 对流换热 数值模拟 发动机 

分 类 号：TK401[动力工程及工程热物理—动力机械及工程]