开口空腔内湍流自然对流与表面辐射的耦合传热  

COMBINED HEAT TRANSFER OF TURBULENT NATURAL CONVECTION AND SURFACE RADIATION IN AN OPEN CAVITY

作　　者：林成先[1] 辛明道[1] 张洪济[1] 

机构地区：[1]重庆大学工程热物理研究所

出　　处：《重庆大学学报（自然科学版）》1991年第6期1-7,共7页Journal of Chongqing University

基　　金：国家教委科学基金

摘　　要：对具有单个加热壁的二维方形开口空腔内的湍流自然对流与表面辐射的耦合传热进行了数值研究。结果表明,辐射强烈地影响腔内的流场及温度场,它既可增强也可减弱空腔的湍流自然对流换热;不同Rayleigh数和温差比下,空腔的总换热率及辐射所占份额均呈现不同的变化规律。A numerical study is carried out for the combined heat transfer of turbulent natural convection and surface radiation in an two-dimensional open square cavity with only one heated wall. The results show that the radiation significantly affects the velocity and temperature fields,and it can reduce the turbulent natural convection heat transfer as well as enhance it. For different Rayleigh number and temperature difference ratio,the overall heat transfer rates and the portion of radiation present different variation patterns.

关 键 词：表面辐射 传热 自然对流 湍流 

分 类 号：TK124[动力工程及工程热物理—工程热物理]