环形狭缝通道内沸腾换热传热特性的实验研究  

The Forced Boiling Heat Transfer Characteristic in Narrow Annular Gap

作　　者：刘瑞兰[1] 贾斗南[1] 王增辉[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,710049

出　　处：《核科学与工程》2001年第3期238-243,共6页Nuclear Science and Engineering

摘　　要：对环形狭缝间隙为 1 0mm ,低质量流量下 ,狭缝内流动沸腾换热的传热特性进行了实验研究。实验以去离子水为工质 ,实验压力范围为 :1 5 5～ 3 72MPa,质量流量的范围是 :9 5 3～ 1 9 65kg/h。实验研究结果表明 :1 以Jens lottes公式对实验数据进行整理 ,得到的公式中的系数明显增大 ,而以Chen公式对实验数据进行整理 ,得到的公式中的系数则有所减小 ,说明此时环形狭缝间隙内的流动沸腾换热很可能是泡核沸腾和两相强制对流共同起作用的结果。 2 在实验所做的参数范围之内 ,内管的传热系数比外管的高。Forced boiling heat transfer characteristic in narrow annular gap is studied. In experiment, the outer tube and inner tube of the annular gap are heated using electricity. Heated water fluid is flowed from down to up along the annular gap. The gap is 1.0 mm wide; working fluid:distilled water; pressure:1.55～3.72 MPa; mass flow rate: 9.53～19.65 kg/h. Experiment results show that:1) Using the Jens lottes expression to deal with the experimental data, the heat transfer coefficients in the formula is obviously higher than that of before. Using the Chen expression, the coefficients is lower. This shows that the forced boiling heat transfer characteristic in the annular gap is affected by saturated nucleate boiling and the two phase forced convective. 2) In the range of experiment, the heat transfer coefficient of inner tube is higher than that of outer tube.

关 键 词：沸腾换热 环形狭缝 低质量流量 传热特性 实验研究 核反应堆 热工水力学 

分 类 号：TL331[核科学技术—核技术及应用]