窄缝环形通道内饱和沸腾的实验研究  

Experimental Study of the Saturated Boiling Heat Transfer in Vertical Narrow Annular Gap

作　　者：张弛[1] 吴埃敏[1] 苏光辉[1] 彭常宏[1] 秋穗正[1] 褚俊[1] 贾斗南[1] 聂常华[2] 

机构地区：[1]西安交通大学核能与热能工程系,710049 [2]中国核动力研究设计院,成都610041

出　　处：《核动力工程》2003年第S2期88-91,96,共5页Nuclear Power Engineering

基　　金：获中国核动力研究设计院空泡物理;自然循环国防重点实验室的资助

摘　　要：对间隙为1.5mm的同心环形通道内流动换热的饱和沸腾进行了实验与理论研究。实验通过电加热内外不锈钢管道来控制改变热流密度,工质为去离子水。文中以加热当量直径作为研究窄缝环形通道的定性尺寸。实验结果表明,在间隙为1.5mm的同心垂直环形窄缝通道中的饱和沸腾,与常规尺寸圆管换热相比,起到了强化作用。通过对实验数据的总结,得出了中压、低流量情况下的沸腾换热系数的经验计算公式。In this paper, the saturated boiling heat transfer in an annular gap (δ=1.5mm) has been experimentally and theoretically studied .The distilled water is heated by electricity. It is indicated that the satu- rated boiling heat transfer in vertical annular gap is stronger than that in circular tubes founded on the heated equivalent diameter. Based on experimental data, a new correlation is proposed for this special saturated boiling heat transfer in the special heated annular gap.

关 键 词：垂直环形通道 饱和沸腾 加热当量直径 

分 类 号：TK124[动力工程及工程热物理—工程热物理]