环形狭缝过热气传热试验研究  

Heat Transfer of Super Gas in Narrow Annular Gap

作　　者：王增辉[1] 刘瑞兰[1] 贾斗南[1] 苏光辉[1] 秋穗正[1] 

机构地区：[1]西安交通大学能源与动力工程学院,西安710049

出　　处：《西安交通大学学报》2002年第7期697-700,共4页Journal of Xi'an Jiaotong University

摘　　要：对以去离子水为工质的过热气流过电加热的环形狭缝进行了换热试验研究 .试验结果表明 :环形狭缝中的过热气热交换参数与普通圆管有着显著的不同 ,随着狭缝间隙的减小 ,狭缝中的换热得到了增强 ;当内、外管热流密度相等时 ,内管换热系数大于外管换热系数 ,并且此时环形狭缝的换热能力最强 .应用试验结果和多元线性回归方法 ,拟合出适合试验数据的经验关系式 .Heat transfer of supper gas from distilled water at high temperature in narrow annular gap with width of 1 0, 1 5 and 2 0 mm has been experimentally investigated. The results indicated that characteristics of heat transfer in narrow channel are significantly different from that in the common tube. It was found that the smaller the gap width, the bigger the heat transfer coefficient. Using multivariate linear analysis, a heat transfer equation from the experiment results was suggested for engineering application.

关 键 词：传热试验 环形狭缝 过热气 多元线性回归 狭缝传热 换热系数 换热能力 

分 类 号：TK124[动力工程及工程热物理—工程热物理]