临界热流密度流体模化方法与分析

Methods and analysis of fluid to fluid modeling of critical heat flux

为比较模化工质和实际工质的参数,计算R12、R22、R123、R134a、水在液气密度比172～4条件下的压力变化范围,简单介绍流体模化理论基础并评述已有典型临界热流密度流体模化模型的特点。分析认为氟利昂类物质汽化潜热低,温度压力参数比高温高压水蒸气低一个数量级,作为模化工质可降低实验困难70%～80%,节能80%左右,考虑到环保性能,替代制冷剂R134a等可作为理想的模化工质。最后讨论了CHF流体模化方法理论和实验方面的几个问题及其改进方向。

The pressure ranges of Freon R12,R22,R123,R134a and water were calculated to compare with each other at the same liquid-gas density ratio 172～4.And fluid to fluid modeling method and classical modelings were introdued in this paper.The difficulty of experiments will be cut by 70%～80%,and costs by about 80% using Freon as modeling fluid because of its low latent heat.The alternative refrigerant R134a was considered to be the best choice for modeling fluid,because of its excellent environmental and thermophysical properties.At the end,the methods to develop fluid to fluid modeling technique were mentioned in both theory and practice.