窄环隙流道内自然对流沸腾换热实验研究  

Experimental Investigation of Natural Convective Boiling Heat Transfer in Narrow Annuli

作　　者：孙中宁 阎昌琪 杜泽 张志华 

机构地区：[1]哈尔滨工程大学动力工程系,150001

出　　处：《核科学与工程》2000年第1期57-63,共7页Nuclear Science and Engineering

摘　　要：以水为工质 ,在常压下对竖直和倾斜环隙流道进行了自然对流沸腾换热实验研究 ,给出并讨论了间隙大小、热负荷、倾角和表面张力对换热性能的影响 ,可视化观察加深了对窄小空间沸腾现象的认识。在实验的基础上 ,提出了一个新的、可以较方便使用的传热计算关联式。Natural convective boiling of water in vertical and inclined narrow annuli was experimentaly investigated under atmospheric pressure with both end open. The effects of gap width, heat flux, inclination angle and surface tension on heat transfer performance were presented and discussed. Visual observation was done to get deeper understanding of boiling heat transfer in narrow space. Based on experimental results,a new heat transfer correlating expression was derived. This expression is more convenient to use compared with existing correlations

关 键 词：沸腾换热 窄环隙流道 传热计算 

分 类 号：TK124[动力工程及工程热物理—工程热物理]