An investigation on the supersonic ejectors working with mixture of air and steam

作者：Shafaee Maziar^*; Tavakol Mohsen; Riazi Rouzbeh; Sharifi Navid

来源：Journal of Mechanical Science and Technology, 2015, 29(11): 4691-4699.

DOI：10.1007/s12206-015-1016-y

• Computational fluid dynamics
• Entrainment ratio
• Steam ejector
• Supersonic flow
• Working fluid

This study evaluated the performance of an ejector using two streams of fluids as suction flow. Three motive flow pressures were considered when investigating ejector performance; the suction flow pressure was assumed to be constant. The suction flow consisted of a mixture of air and steam and the mass fraction of air in this mixture varied from 0 to 1. The ejector performance curves were analyzed for different mass fractions of air. The results indicate that variation of the mass fraction of air in the suction flow mixture had a significant effect on ejector performance. At all motive flow pressures, the ejector entertainment ratio increased as the mass fraction of air in the suction flow increased. The results also show that the sensitivity of ejector performance to variation in the mass fraction of air in the suction flow decreases at higher motive flow pressures. An increase in motive flow pressure caused the transition from supersonic to subsonic flow to occur at higher ejector discharge pressures.

• 出版日期2015-11