刘永;李国祥;
1:山东大学能源与动力工程学院
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。通过与实验结果的对比,表明模型适用于缸盖冷却水腔内沸腾传热计算。实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度分布情况。
关键词： 单相流沸腾模型;;冷却水腔;;沸腾传热;;空泡份额;;压力
Abstract: A new single phase boiling flow
model was developed based on VC++ 6.0,by making use of void fraction,the model
regards boiling liquid as a single phase flow in which vapor and liquid are
homogeneously mixed.The mathematical description and the numerical
implementation method of the model are introduced.Test validation proved the
model can be applied in the boiling heat transfer calculation of cooling water
jacket.And the results also show that pressure has notable effects on boiling
heat transfer.At last,take water-jacket of 226B diesel engine as practical
engineering application,the void fraction and the velocity filed of the water
jacket were calculated.
Keywords: Single Phase Boiling Flow
Model;Cooling Water Jacket;Boiling Heat Transfer;Void Fraction;Pressure
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