Study on the Steam Ejectors (3rd Report)

Abstract

Each dimension of the steam ejector has the great effects on its characteristic and efficiency. Then it is the purpose of this paper to know the effects of the dimensions of diffuser on the steam ejector. By the calculation method of flow in diffuser (2nd Report), the following facts have been discovered. The length of convergent part of diffuser L₁ is to be long as much as possible. If the diameter of diffuser throat D_t is made small, the exit pressure of diffuser will take high value, but the hysteresis phenomena will be apt to rise. It is desirable to make the length of throat L_t=(5∼6)·D_t and the length of divergent part L≨ 10D_t.