并联螺旋蒸发管内汽液两相流动不稳定性的模化试验研究

MODELING EXPERIMENTAL STUDY OF TWO-PHASE FLOW INSTABILITY IN PARALLEL COILED EVAPORATING TUBES

本文使用积分方程无因次分析方法首次推导得到了进行汽液两相流动不稳定性模化试验研究所要求的相似准则；在相似理论指导下，使用氟里昂作介质，对并联螺旋蒸发管内汽液两相流动不稳定性进行了实验，得到了描述不稳定性发生界限的经验关系式；进而将氟里昂的模化试验结果转换成高压水的数据，并用苏联蒸汽锅炉水力计算标准方法进行了校验。

In this paper modeling criteria of two phase flow instability are derived on the basis of dimensionless analysis of the integral equations. Experimental study of flow instability in paralle coiled evaporating tubes with R-12 is carried out according to the similarity theory.An empirical equation describing the threshold conditions of flow instability is obtained. The R-12 experimental results obtained are transformed to corresponding high pressure water data and then checked with the normalized hydrodynamic calculation method for steam generators of USSR.