重力场下单循环与双循环小通道热驱动比较研究  

THERMALLY DRIVEN COMPARISON OF SMALL SINGLE-CYCLIC CHANNEL AND SMALL DOUBLE-CYCLIC CHANNEL IN GRAVITATION FIELD

作　　者：夏婕[1] 常海萍[1] 

机构地区：[1]南京航空航天大学能源与动力学院,江苏南京210016

出　　处：《工程热物理学报》2004年第6期1019-1021,共3页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(50276027);国防基础科研资助项目(No.J1400D001)

摘　　要：本文以实验的方法,对重力场下单循环与双循环小通道热驱动进行了比较研究。两者都是一端加热,一端冷却,利用彻体力场下流体的热驱动来实现换热。实验结果表明,在热流密度相同的情况下,双循环小通道比单循环具有更好的换热效果。因此,将微小循环通道换热运用于涡轮叶片的冷却时可以考虑采用双循环甚至多循环通道。Experiments are carried out to investigate the thermally driven in different type cyclic channels (single-cyclic and double-cyclic channels) in gravitational field. Each channel is heated at one end and cooled at the other end. The fluid's thermally driven is used to get heat exchanged in a high body-force field. All the results show that the small double-cyclic channel can achieve more effective heat transfer effect than the single-cyclic channel under the same heat flux. Therefore double cyclic channel or multi-cyclic channel can be utilized to get lager heat transfer coefficient in cooling techniques of turbine blades.

关 键 词：传热 热驱动 循环 

分 类 号：TK124[动力工程及工程热物理—工程热物理]