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对新型双喷射制冷系统中的喷射泵建立了达到最大提升压力时的数学模型,计算结果与实验数据吻合较好。针对新型系统中喷射泵的特点,以水为工质,分析了喷射泵的引射系数、混合室无量纲结构参数、工作蒸气参数及冷凝温度对喷射泵最大升压性能的影响。结果表明,引射系数越大,喷射泵的最大排出压力越低;混合室的无量纲结构参数越大,喷射泵的最大排出压力越低;工作蒸气的压力越高,喷射泵的最大排出压力越高;冷凝温度越高,喷射泵的最大排出压力越低。
The mathematical model of the jet pump in the new twin injection refrigeration system is established when the maximum lifting pressure is reached. The calculated results are in good agreement with the experimental data. Aiming at the characteristics of the jet pump in the new system, the influence of the injection coefficient of the jet pump, the dimensionless structure parameter of the mixing chamber, the working steam parameters and the condensing temperature on the maximum boost performance of the jet pump are analyzed using water as the working fluid. The results show that the larger the ejection coefficient, the lower the maximum discharge pressure of the jet pump. The larger the dimensionless structure parameter of the mixing chamber, the lower the maximum discharge pressure of the jet pump. The higher the pressure of the working steam, the maximum discharge pressure of the jet pump The higher the condensing temperature, the lower the maximum discharge pressure of the jet pump.