光管及窄环隙流道池沸腾换热实验研究  

EXPERIMENTAL INVESTIGATION OF POOL BOILING HEAT TRANSFER ON BARE TUBE AND IN NARROW ANNULI

作　　者：孙中宁 阎昌琪 杜泽 

机构地区：[1]哈尔滨工程大学动力工程系,黑龙江哈尔滨150001

出　　处：《工程热物理学报》2001年第4期485-487,共3页Journal of Engineering Thermophysics

摘　　要：本文在常压下以水为工质，对管外及窄环隙流道池沸腾换热进行了可视化实验，结果表明：汽泡扰动并不是沸腾换热系数高的主要原因，液体过冷使核沸腾的换热能力降低，窄隙流道内的沸腾换热机理与普通的大容积沸腾没有明显区别。文中还根据观察和测量到的结果对一些换热现象重新进行了解释。Boiling heat transfer from bare tube and in narrow annuli was experimentally studied. The results indicated that the disturbance of vapor bubble is not the major reason why boiling heat transfer coefficient is high, liquid subcooling makes boiling heat transfer capacity decreased, and the mechanism of boiling heat transfer in narrow space has no obvious difference compared with conven- tional pool boiling. Based on the visualization and measurement, some heat transfer phenomena were reinterpreted.

关 键 词：沸腾换热 池沸腾 窄环隙 光管 实验 

分 类 号：TK124[动力工程及工程热物理—工程热物理]