R290小型文丘里分流器与新型整流喷嘴式分流器的仿真与实验对比研究  

Simulation Study of Venturi Shunt and New Rectifier Nozzle Shunt for R290 Air-conditioning

作　　者：胥照 孙志利[1] 刘圣春[1] 代宝民 王派 张文甫 Xu Zhao;Su Zhili;Liu Shengchun;Dai Baomin;Wang Pai;Zhang Wenfu(Tianjin University of Commerce,Tianjin Key Laboratory of Refrigeration Technology,Tianjin,300134,China)

机构地区：[1]天津商业大学天津市制冷技术重点实验室,天津300134

出　　处：《冷藏技术》2024年第2期20-27,共8页Journal of Refrigeration Technology

基　　金：生态环境部对外合作与交流中心资助项目(FECO/LY1/S/21/171)。

摘　　要：为了解决小型多支路蒸发器因制冷剂分配不均匀导致换热性能下降现象,设计了小型制冷系统蒸发器新型分流器。基于欧拉多相流模型,建立小型文丘里分流器和整流喷嘴式分流器的物理模型和数学模型,并通过CFD模拟和实验,对此两种分流器内部的流型流态和分流均匀性展开对比研究。模拟结果表明,在不同流量、不同干度下,整流喷嘴式分流器质量流量和干度不均匀度均小于文丘里分流器。实验结果表明,文丘里分流器中未形成均匀稳定的环状流,而在整流喷嘴式分流器中形成稳定环状流,且实验测试的后者的体积流量不均匀度远小于前者,进而也验证了与传统文丘里分流器相比,新型整流喷嘴式分流器对R290制冷剂的分流效果更优。In order to solve the problem of decreasing heat transfer performance of small multi-branch evaporator due to uneven refrigerant distribution,a new type shunt for evaporator of small refrigeration system is designed in this study.Based on the Euler multiphase flow model,the physical model and mathematical model of the small Venturi shunt and the rectifier nozzle shunt are established,and the flow pattern and shunt uniformity inside the two shunt are compared by CFD simulation and experiment.The simulation results show that the mass flow and dryness of the diverter are smaller than those of the Venturi diverter under different flow rates and different dryness.The experimental results show that no uniform and stable annular flow is formed in the Venturi shunt,but a stable annular flow is formed in the rectifer nozzle shunt.Moreover,the volume flow unevenness of the rectifer nozzle shunt tested in the experiment is much smaller than that of the Venturi shunt,and it also verifies that compared with the traditional Venturi shunt,the volume flow of the rectifer nozzle shunt tested in the experiment is much smaller than that of the Venturi shunt.The new rectifier nozzle type shunt has better shunt effect on R290 refrigerant.

关 键 词：制冷 整流喷嘴式分流器 CFD模拟 R290 

分 类 号：TB657[一般工业技术—制冷工程]