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research-article

Nozzle Aspect Ratio Effect on Supersonic Elliptic Jet Mixing

[+] Author and Article Information
S M Aravind Kumar

Ph.D Scholar, Indian Institute of Technology Kanpur, India
aravinds@iitk.ac.in

Ethirajan Rathakrishnan

Professor, Indian Institute of Technology Kanpur, India
erath@iitk.ac.in

1Corresponding author.

ASME doi:10.1115/1.4036823 History: Received February 22, 2016; Revised May 09, 2017

Abstract

Nozzle aspect ratio effect on the mixing of Mach 2 elliptic free jet, issuing from the convergent-divergent elliptic nozzles of aspect ratio 2, 3 and 4, in the presence of adverse and marginally favorable pressure gradients at the nozzle exit has been studied experimentally. The results show that AR4 jet enjoys better mixing than AR2 and AR3 jets at all nozzle pressure ratios. The AR2 and AR3 jets displayed axis switching where as there is no axis switching for AR4 jet. The shadowgraph shows that the waves in AR4 jet are weaker than those in AR2 and AR3 jets.

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