液膜沸腾条件下厚液层厚度物理模型研究

发布时间：2019-01-04 16:20

【摘要】：沸腾传热近加热壁面"厚液层(Macrolayer)"的特性对于临界热流密度的触发具有决定性的作用。然而,沸腾条件下厚液层厚度的实验数据很缺乏,预测模型也尚不完善。本文通过液膜沸腾实验获得了不同热流密度下厚液层的特征厚度。现有的厚液层预测模型中,Haramura与Kumada模型的预测值低于实验值,Sadasivan模型的预测值高于实验值。本文基于Haramura模型,建立的厚液层厚度预测模型具有较高的精度,最大误差降低到12%,适用范围在0.5q_(CHF)到q_(CHF)之间。
[Abstract]:The characteristics of boiling heat transfer near heating wall "thick liquid layer (Macrolayer)" play a decisive role in triggering the critical heat flux. However, the experimental data of thick liquid layer thickness under boiling condition are scarce, and the prediction model is not perfect. In this paper, the characteristic thickness of thick liquid layer under different heat flux is obtained by liquid film boiling experiment. In the existing thick liquid layer prediction models, the predicted values of Haramura and Kumada models are lower than the experimental values, and the predicted values of the Sadasivan model are higher than the experimental values. Based on Haramura model, the thickness prediction model of thick liquid layer has high accuracy, the maximum error is reduced to 12, and the applicable range is between 0.5q _ (CHF) and q- (CHF).
【作者单位】：上海交通大学核科学与工程学院;
【基金】：国家自然科学基金项目(No.51306112)
【分类号】：TK124

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