一、前言正象上一篇的实验结果所表明的那样,蒸汽喷射器的扩压器中气体的流动状态有以下两种情况:即蒸汽及其压缩的气体的混合过程和动能向压力能转换的过程。但过去所述的喷射器的计算方法通常忽略了气体的混合过程,而只考虑了能量的转换过程,即假设喷咀出来的蒸汽喷流在等压的条件下,立即与混合室的气体完全混合或进行动量转换。所以正如A·Stodola所指出的用此种计算方法很难估计扩压器某一断面上各点速度的均匀程度,因而要严密地运用能量方程式是困难的,故这种方法在实际计算中不是 I. INTRODUCTION As the experimental results in the previous article show, the gas flow in the diffuser of a steam injector has two conditions: the mixing of steam and its compressed gas, and the conversion of kinetic energy to pressure energy the process of. However, in the past, the calculation method of the injector usually neglected the mixing process of the gas, and only considered the energy conversion process. That is, assuming that the jet flow from the nozzle is under equal pressure, the gas in the mixing chamber is completely Mix or move momentum. Therefore, as pointed out by A. Stodola, it is difficult to estimate the uniform velocity of each point of a section of the diffuser by this calculation method. Therefore, it is difficult to strictly use the energy equation. Therefore, this method is not actually calculated