Heat-transfer correlations for natural convection boiling
Heat-transfer correlations for natural convection boiling
复制标题
DOI：
10.1016/0017-9310(80)90140-4
复制
发表时间：
1980
影响因子：
5.2
通讯作者：
K. Stephan;M. Abdelsalam
中科院分区：
文献类型：
--
作者：
K. Stephan;M. Abdelsalam
尽管人们在自然对流沸腾传热系数方面做了大量的工作，但迄今为止还没有一套完整的理论来预测自然对流沸腾传热系数。为了建立具有广泛应用价值的关联式，对已有的近5000个自然对流沸腾换热实验数据进行了回归分析。正如分析所表明的那样，这些数据的最佳表示方法是将物质细分为四类（水、碳氢化合物、低温液体和制冷剂），并对每一类物质采用一套不同的无量纲数，因为某些无量纲数对一类物质很重要，对另一类物质则不重要。可以建立一个对所有物质都有效的方程，但它的准确性将低于在不增加不必要的复杂性的情况下获得的单个相关性。
To-date there exists no comprehensive theory allowing the prediction of heat-transfer coefficients in natural convection boiling, in spite of the many efforts made in this field. In order to establish correlations with wide application, the methods of regression analysis were applied to the nearly 5000 existing experimental data points for natural convection boiling heat transfer. As demonstrated by the analysis, these data can best be represented by subdividing the substances into four groups (water, hydrocarbons, cryogenic fluids and refrigerants) and employing a different set of dimensionless numbers for each group of substances, because certain dimensionless numbers important for one group of substances are unimportant to another. One equation valid for all substances could be built up, but its accuracy would be less than that obtained for the individual correlations without adding undesirable complexity.