Effect of mixing chamber structure on the performance of adjustable ejector
JIA Xiao-liang
ZHOU Zhong
LI Zhi
SUN Ning-yu
YANG Wen-xuan
SHI Le-xin
Abstract：In this paper,the non azeotropic mixed refrigerant R41/R1234yf is selected as the work material.By means of numerical simulation,the influence of operating parameters on the performance is investigated at different adjustable cone diameter ratios.The simulation results show that when other operating parameters are unchanged,the smaller the cone diameter ratio is,the larger the critical back pressure of the ejector is.The critical back pressure is 0.30 MPa for a cone diameter ratio of 0%and 0.28 MPa for a cone diameter ratio of 27%.With the increase of working fluid pressure,the entrainment ratio shows a trend of increasing and then decreasing,and there is an optimal working fluid pressure.Adjustable ejector in the variable operating conditions,can be moved axially through the adjusting cone to change the nozzle cross-sectional area,so that the ejector can work in a wider range of operating parameters.
Keywords：mixed refrigerantadjustable ejectornumerical simulationoperating parametersejector performance
Publication Date：2024-11-15
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 56-59 )