naa a22 4500 510766153 CHVBK 20180411083157.0 cr unu---uuuuu 180411e20131001xx s 000 0 eng 10.1007/s11630-013-0648-4 doi (NATIONALLICENCE)springer-10.1007/s11630-013-0648-4 Numerical analysis of Chevron nozzle effects on performance of the supersonic ejector-diffuser system [Elektronische Daten] [Fanshi Kong, Yingzi Jin, Toshiaki Setoguchi, Heuy Kim] The supersonic nozzle is the most important device of an ejector-diffuser system. The best operation condition and optimal structure of supersonic nozzle are hardly known due to the complicated turbulent mixing, compressibility effects and even flow unsteadiness which are generated around the nozzle extent. In the present study, the primary stream nozzle was redesigned using convergent nozzle to activate the shear actions between the primary and secondary streams, by means of longitudinal vortices generated between the Chevron lobes. Exactly same geometrical model of ejector-diffuser system was created to validate the results of experimental data. The operation characteristics of the ejector system were compared between Chevron nozzle and conventional convergent nozzle for the primary stream. A CFD method has been applied to simulate the supersonic flows and shock waves inside the ejector. It is observed that the flow structure and shock system were changed and primary numerical analysis results show that the Chevron nozzle achieve a positive effect on the supersonic ejector-diffuser system performance. The ejector with Chevron nozzle can entrain more secondary stream with less primary stream mass flow rate. Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag Berlin Heidelberg, 2013 Ejector-Diffuser System nationallicence Chevron Nozzle nationallicence Shock Wave nationallicence Compressible Flow nationallicence Supersonic Flow nationallicence Kong Fanshi College of Mechanical Engineering & Automation, Zhejiang Sci-Tech University, Hangzhou, China aut Jin Yingzi College of Mechanical Engineering & Automation, Zhejiang Sci-Tech University, Hangzhou, China aut Setoguchi Toshiaki Department of Mechanical Engineering, Saga University, Saga, Japan aut Kim Heuy School of Mechanical Engineering, Andong National University, Andong, Korea aut Journal of Thermal Science Springer Berlin Heidelberg 22/5(2013-10-01), 459-466 1003-2169 22:5<459 2013 22 11630 https://doi.org/10.1007/s11630-013-0648-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11630-013-0648-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kong Fanshi College of Mechanical Engineering & Automation, Zhejiang Sci-Tech University, Hangzhou, China aut NATIONALLICENCE 700 1- Jin Yingzi College of Mechanical Engineering & Automation, Zhejiang Sci-Tech University, Hangzhou, China aut NATIONALLICENCE 700 1- Setoguchi Toshiaki Department of Mechanical Engineering, Saga University, Saga, Japan aut NATIONALLICENCE 700 1- Kim Heuy School of Mechanical Engineering, Andong National University, Andong, Korea aut NATIONALLICENCE 773 0- Journal of Thermal Science Springer Berlin Heidelberg 22/5(2013-10-01), 459-466 1003-2169 22:5<459 2013 22 11630 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer