冰箱喷射器最优喷射系数分析  

Optimum eject-coefficient of refrigerator-ejector

作　　者：刘益才[1] 曹立宏[1] 马卫武[1] 黄谦[1] 辛天龙[1] 张明研[1] 宛超[1] 

机构地区：[1]中南大学能源科学与工程学院,湖南长沙410083

出　　处：《中南大学学报（自然科学版）》2009年第2期329-333,共5页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(50676110);中南大学研究生教育创新工程学位论文创新选题基金资助项目(1343-77327)

摘　　要：利用计算流体力学FLUENT软件,建立冰箱喷射器内部流体流动模型,根据新型压缩/喷射混合制冷循环系统冰箱实验样机的实际运行情况和操作参数,对制冷剂在冰箱喷射器内喷射、引射、混合、扩散等现象进行数值仿真研究;对冰箱喷射器混合室流场结构及引射机理进行探讨;同时,研究喉管面积比对冰箱喷射器性能的影响。研究结果表明:冰箱喷射器的操作参数和几何参数对其波系结构影响很大,在其他参数一定的情况下,存在一个最佳的喉管面积比ψopt=7.513,对应于最高的喷射系数u=0.561。A commercial CFD scheme FLUENT was used to simulate the fluid flow process in refrigerator-ejector. According to the practical operating conditions and parameters of the new-typed compression/injection hybrid refrigeration cycle system, the refrigerant properties such as injecting, aspirating, mixing, diffusing in the refrigerator-ejector were studied. The flow field structure of refrigerator-ejector mixing chamber and mechanism of aspiration were explored. At the same time, the performance of refrigerator-ejector was investigated by changing the throat area ratio. The numerical results clearly indicate that the operating and geometric parameters have great influence on structure of wave system of refrigerator-ejector. When other parameters have no change, there is an optimum throat area ratio ψopt=7.513, corresponding to the highest eject-coefficient u=0.561.

关 键 词：冰箱 喷射器 喉管面积比 喷射系数 

分 类 号：TB651[一般工业技术—制冷工程]