酒精-水混合蒸气凝结换热系数的计算模型  

A MODEL FOR CALCULATING HEAT TRANSFER COEFFICIENT CONCERNING ETHANOL-WATER MIXTURE CONDENSATION

作　　者：胡申华[1] 王进仕[1] 严俊杰[1] 杨豫森[1] 

机构地区：[1]西安交通大学动力工程多相流国家重点实验室,陕西西安710049

出　　处：《工程热物理学报》2009年第10期1693-1696,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金项目(No.50476048;No.50521604)

摘　　要：通过将膜状凝结和珠状凝结理论相结合建立了一个新的模型,用于计算酒精-水混和蒸气Marangoni凝结换热系数,该模型引入一个特性系数将膜状凝结和珠状凝结理论相结合,并考虑了酒精浓度、蒸气压力和流速的影响。在不同的压力和流速下,模型计算的结果与实验和相关文献进行了比较,最大误差为±30%.An attempt is made to calculate a heat transfer coefficient （HTC） by combining the filmwise theory with the dropwise notion for ethanol-water mixture condensation. A new model, including ethanol concentration, vapor pressure and velocity, is developed by introducing a char- acteristic coefficient to combine the two theories mentioned above. At different concentration, pressure and velocity, the calculation is compared with experimental results. It turns out that the cMculated value is in good agreement with the experimental results, the maximal error is within ±30%.

关 键 词：MARANGONI凝结 酒精-水混合物 计算模型 热传递 珠状凝结 

分 类 号：O359.1[理学—流体力学]