中文摘要：

建立了喷射泵的热力学模型,以不同制冷剂为工质,比较了喷射泵的引射系数,计算并比较了喷射泵内的压力和速度变化趋势及混合室内的壁面阻力,在此基础上分析了喷射泵性能存在差异的主要原因。结果表明：喷射泵以水为工质的引射系数要远高于以其他几种制冷剂为工质的引射系数。

英文摘要：

The thermodynamic model of ejector was estabhshed.The entrainment ratios of injector with various refrigerants were compared by using the model.The pressure and velocity change trends in the injector and the wall resistances along the converging stretch of the mixing chamber were calculated and compared,on the basis,the main reason for the performance difference of injector with various refrigerants was analyzed.The results indicate that the entrainment ratio of injector with water is far higher than those with other refrigerants