中高温热泵闪发器两相流动数值模拟  

Numerical simulation on two-phase flow in flash evaporator of semi-high temperature heat pump

作　　者：杨俊[1] 丁国忠[1] 舒水明[1] 郑天轶 徐成良[1] 井煜锋 欧长凯 

机构地区：[1]华中科技大学

出　　处：《制冷与空调》2016年第2期40-42,79,共4页Refrigeration and Air-Conditioning

摘　　要：采用Fluent的Mixture模型,借助UDF对闪发器内闪蒸过程进行数值模拟,分析入口角度及入口流速对闪发器出口气相体积分数的影响。结果表明,入口流速对出口气相体积分数影响较小;当入口角度为60°时,出口气相体积分数最高,当入口流速为10 m/s时,入口角度为60°相比入口角度0°对应的出口气相体积分数高66.67%。研究结果可为中高温热泵中间补气闪发器的结构设计提供参考。Using Fluent Mixture model,the numerical simulation on the flash evaporation in flash evaporator is conducted through UDF.The effects of inlet angles and inlet velocities on the volume fraction of outlet gas for the flash evaporator are analyzed.The simulation results show that the inlet velocity has little impact on the volume fraction of outlet gas.The highest ratio of volume fraction of outlet gas can be achieved at the inlet angle of 60°,and when the inlet velocity is 10 m/s,the volume fraction of outlet gas at the inlet angle of 60°is larger than that of inlet angle of 0°by 66.67%.The study results can provide references for the structure design of the flash evaporator of semi-high temperature heat pump with second gas injection.

关 键 词：热泵 闪发器 入口角度 气相体积分数 入口流速 

分 类 号：TU83[建筑科学—供热、供燃气、通风及空调工程]