小通道内制冷剂两相流动摩擦压降关联式分析

Analysis of Frictional Pressure Drop Correlations of Refrigerant Two-Phase Flow in Mini-Channel

针对小通道内两相流动摩擦压降的关联式进行了全面分析,描述关联式之间的继承发展关系,并指出不同关联式之间的创新之处.为了评估各种关联式在小通道中的通用性和精度,建立了一个大型摩擦压降数据库,此数据库在蒸发和冷凝/绝热工况下分别有1302和1576个数据点.对26种关联式分工况进行评估分析,并发现Sempértegui-Tapia和Kim关联式分别在蒸发工况、冷凝/绝热工况下具有最佳的预测能力,最后提出了关于关联式改进的建议.

This paper presents a comprehensive analysis of the frictional pressure drop correlations in two-phase flow in mini-channel,describes the relationship of inheritance and development between the correlations,and points out the innovation between different correlations.In order to evaluate the universality and precision of various correlations,it establishes a large frictional pressure drop database,which is specialized for mini-channels.This database includes 1302 and 1576 data points under evaporation and condensation/adiabatic conditions,respectively.Finally,it evaluates and analyzes 26 correlations under different conditions.The results show that the Sempértegui-Tapia and the Kim correlation have the best prediction ability under evaporation conditions and condensation/adiabatic conditions,respectively.This paper provides some advice on the improvement of correlation.