STUDY ON THE SPECIAL PHENOMENON OF

DESIGNING AND MANAGING EJECTORS

Jin Liang’an  Wang Xiaotong 

(No.1 Department, Dalian Naval Academy, Dalian 116018)

Liu Xuewu  Li Zhiyi

(Chemical Engineering Department, Dalian University of Technology, Dalian 116012)

Abstract: Based on tests data, a special phenomenon is discovered that the middle insensitive area of ejector in the matching between throat of the gradually expanding tube and that of nozzle. It is decided by the throat of nozzle, the pressure at in and out area, and the difference of the pressure of them. The function formula is set, and it can show the appearance time of this special phenomenon in precise terms. By the conclusions, the ejector can be designed more easily, and the management efficiency about ejectors will be increased.

Key words:Ejector  Design  Manage  Throat matching  Middle insensitive area

CLC No: TE89

国防预研基金资助项目(435B963). Received 20030616, received in revised form 20031010