The inner fluid in the steam pump was discussed through theoretical study, the mathematic model on sucking was educed, and the extension of the model was in conformity to the experimental value of steam eject pump in actual practice.

• 摘要主要对蒸汽喷射泵内流体进行理论研究，推导出了蒸汽喷射泵的抽气数学模型，并给出了该模型与实际蒸汽喷射泵实验值的符合范围。