过程参数描述的等壁温平行平板间层流对流换热特性  

Laminar Heat Transfer Characteristics between Parallel Planes with Uniform Wall Temperature under Process Parameter Description

作　　者：武祥[1,2] 王良璧[1,2] 林志敏[1,2] 宋克伟[1,2] 

机构地区：[1]兰州交通大学机电工程学院,甘肃兰州730070 [2]兰州交通大学铁道车辆热工教育部重点实验室,甘肃兰州730070

出　　处：《兰州交通大学学报》2011年第3期41-46,共6页Journal of Lanzhou Jiaotong University

基　　金：国家自然科学基金(50876040)

摘　　要：传热过程中的过程参数为傅立叶定律定义的热通量.对等壁温平行平板间层流对流换热进行过程参数描述,揭示了壁面上和流体内部流动速度和速度梯度对对流换热的贡献.结果表明:如果把传热过程以过程参数进行描述可以获得对传热的深刻表述和理解.The process parameter of heat transfer is heat flux defined by Fourier law. In this paper, the characteristics of laminar convective heat transfer between parallel planes with uniform wall temperature are studied under process parameter description. With this description, the effects of velocity and velocity gradient on convective heat transfer on the wall surface and inside flow region can be divided. The results show that when the heat transfer is described by process parameter,the deeper understanding on convective heat transfer can be obtained.

关 键 词：对流换热描述 热通量 速度 速度梯度 

分 类 号：TK124[动力工程及工程热物理—工程热物理]