本文对喷射器的性能进行了模化试验研究,发现除面积比、喉嘴距和扩散管对喷射器性能有影响外,混合室锥部压力的明显变化以及被抽吸物的物性是两个不可忽视的因素。由此探讨了喷射器的理论,推演出较具普适性的基本方程,提出确定壁面反力系数、动量修正系数的简易方法。 In this paper, the performance of the ejector has been experimentally modeled and found that in addition to the area ratio, throat distance and diffuser tube ejector performance impact, the significant change in the pressure of the mixing chamber taper and aspirated material properties are two Can not be ignored factor. Based on this, the theory of ejector was discussed, and the more universal basic equation was deduced. A simple method to determine the wall reaction coefficient and the momentum correction coefficient was put forward.