一、前言借助蒸汽喷流将低压气体压缩到某一压强或大气压的装置谓之“蒸汽喷射器”。由于没有运动部分、体积小、结构简单,而且能将大容量的气体压缩等特性,这种装置可作为蒸汽涡轮机冷凝器和蒸发器等的抽气泵,并广泛用作喷射式冷冻机的压缩机。虽然关于这方面的文献很多,但实际设计蒸汽喷射器时,目前多半凭借经验,而有关实验结果仅作参考。此外,在那些文献中并没有充分阐明蒸汽喷射器的各部尺寸对其 I. INTRODUCTION The device for compressing low-pressure gas to a certain pressure or atmospheric pressure by means of a steam jet means “steam ejector”. Because there is no moving parts, small size, simple structure, and high-capacity gas can be compressed and other characteristics, such devices can be used as steam turbine condensers and evaporators and other pump, and is widely used as a jet refrigerator compressor . Although there is a lot of literature on this subject, the actual design of steam injectors is mostly based on experience and the experimental results are for reference only. In addition, the steam injector sizes are not adequately described in those documents