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.
出处
《内燃机学报》
EI
CAS
CSCD
北大核心
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)
关键词
单相流沸腾模型
冷却水腔
沸腾传热
空泡份额
Single phase boiling flow model
Cooling water jacket
Boiling heat transfer
Void fraction
