一种适用于缸盖水腔沸腾传热计算的模型  

A New Single Phase Boiling Model for Heat Transfer Calculation of Cooling Water-Jacket in Cylinder Head

作　　者：刘永[1] 李国祥[1] 付松[1] 石秀勇[1] 白书战[1] 

机构地区：[1]山东大学能源与动力工程学院,山东济南250061

出　　处：《内燃机学报》2008年第1期76-82,共7页Transactions of Csice

基　　金：国家重点基础研究发展计划(2007CB206900);国家863项目(2006AA11A1A8);山东省自然基金项目(Y2007F26)

摘　　要：基于VC++6.0开发了一种单相流沸腾传热模型,通过引入空泡份额的概念将沸腾发生时的流场看作一个气液均匀混合的单相流,从数学上对该模型进行了描述并介绍了模型的数值实现方法。通过与试验结果的对比,表明模型适用于缸盖冷却水腔内沸腾传热计算。试验和计算结果还表明,压力对沸腾传热的影响较为明显。最后以226B型发动机水腔为工程应用对象,计算出了水腔内的空泡份额分布和水腔内的流速分布情况。A new single phase boiling flow model was developed based on VC ^＋＋ 6.0. By introducing the void fraction, the model can be treated as a single phase flow in which vapor and liquid are homogeneously mixed. The mathematical description and the numerical simulation of the model are introduced. Test vali： dation showed that the model could be used in calculating the boiling heat transfer of cooling water jacket. The results also showed a notable effect from pressure on boiling heat transfer. Taking water-jacket of 226B diesel engine as the practical objective, the calculation in void fraction and the velocity filed of the water jacket were made.

关 键 词：单相流沸腾模型 冷却水腔 沸腾传热 空泡份额 

分 类 号：TK421[动力工程及工程热物理—动力机械及工程]