单相喷射器内二维流场数值模拟与结构设计

摘要

基于经典空气动力学方法设计了一种手动可调的喷射器，分析压缩喷射式混合制冷系统中流量分配系数、高低温蒸发温度对喷射器设计最优尺寸影响，采用计算流体力学(CFD)软件对可调喷射器内部速度场和压力场进行数值模拟，仿真的喷射系数计算值与实验值吻合较好，表明采用 CFD 软件可以较好地预测单相喷射器的工作性能，同时分析了主流体压力、引射流体压力及出口流体压力对喷射器性能影响。%An adjustable ejector was designed based on classical aerodynamic method. In compression ejection hybrid refrigeration system, the influence of mass flow distribution ratio, high and low evaporating temperature on the ejector optimal dimension was also analyzed. The velocity field and pressure field of the adjustable ejector was simulated by CFD software. And the simulated ejector ratio was agreed with experimental ejector ratio well, which indicated that the working performance of single-phase ejector could be predicted well by CFD software. Moreover, the effect of primary flow pressure, suction flow pressure and out flow pressure on ejector ratio was investigated.