作　　者： ; ; ; ;

机构地区： 西安交通大学能源与动力工程学院动力工程多相流国家重点实验室

出　　处： 《化学工程》 2008年第8期13-16,共4页

摘　　要： 分别以煤油和水为工质,对不同流速情况下波纹管和光管的管内流动沸腾传热特性进行了试验研究。试验中采用套管式换热器,依靠管外的高温热水对管内工质加热使之沸腾。在不同流速下,根据试验测量的流量和温度等参数计算管内流动沸腾传热系数。结果表明:随着气相雷诺数的提高,传热系数随之提高;相对光管,波纹管对上升流动管内沸腾传热有明显的强化作用。根据试验结果给出了波纹管管内流动沸腾传热系数关联式。 The characteristics of boiling heat transfer inside both corrugated and smooth tubes were investigated experimentally with water and kerosene as working fluids. The sleeve heat exchanger was tested. The fluid inside tubes was heated to ebullience by the high temperature water outside tubes. At different velocity of flow, the boiling heat transfer coefficient was calculated according to the parameters of flow rate and temperature measured in the experiment. The results show that the boiling heat transfer coefficient increases with the increasing of the vapour Reynolds number. Compared with the smooth tube, the corrugated tube has an effective enhancement for the boiling heat transfer inside tubes. The correlations of boiling heat transfer coefficient of corrugated tubes were established.

关 键 词： 波纹管 水 煤油 沸腾 强化传热

领　　域： [化学工程]