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。
Stability and integrity of macrolayer is of paramount importance in triggering critical heat flux. But, few experimental data are available to quantify the macrolayer thicknessand validate the prediction models. In this study, the characteristic macrolayer thicknesses under different heat fluxes were measured to calibrate different models proposed by Haramura, Sadasivan and Kumada. It was found that Haramura＇s model and Kumada＇s model underestimate the macro layer thickness while Sadasivan＇s model overestimate it. Based on the Haramura＇s model, a new model was developed which has good prediction accuracy with maximal error of around 12%. The new model is valid between 0.5qCHF and qCHF.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2016年第11期2424-2429,共6页
Journal of Engineering Thermophysics
基金
国家自然科学基金项目(No.51306112)
关键词
厚液层
液膜沸腾
厚度预测模型
macrolayer
liquid film boiling
prediction model
