Experimental study of the influence of nozzle and mixing chamber dimensions on the performance of the ejector

The present paper investigates the effect of the primary nozzle and mixing chamber dimensions on the performance of a rectangular ejector using air as the working fluid. The experimental set-up is introduced first and the operating conditions and geometrical parameters of the ejector is listed. Five interchangeable nozzles with varied throat diameters and eight mixing chambers with different cross-sectional sizes have been designed in this research. The performance of the ejector equipped with these nozzles and mixing chambers is then experimentally compared. In addition, the influence of different operating conditions on the performance of the ejector equipped with different nozzles and mixing chambers is experimentally examined, and the performance curves of the ejector working in the subcritical and off-design mode are analyzed.