Effect of Secondary Nozzle Angle Orientation on Subsonic Coaxial Jet Mixing

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K. Sharma
R.N. Shankar
K. Sathishkumar
S. Bavithran
S. Kannan
S.D. Kishore
R. Arunprasath
V.J. Gilbertraj

Abstract

In this article, the effects of Secondary Nozzle Angle Orientation (SNAO) on subsonic coaxial jet decay have been studied numerically. The SNAO cases chosen for the study were 15(, 30( and 45( respectively and were compared. The analysis is focused on the jet mixing characteristics of the mentioned nozzles by studying the Mach number decay curves along with the contours of Mach number and density. The findings indicate that the 45° converging angled secondary jet case exhibits, superior reduction in potential core length compared to other configurations in the study. Additionally, the angle variation of the coaxial nozzle significantly impacts jet mixing inhibition characteristics. Coaxial jets with a 45( orientation demonstrate considerably higher mixing compared to those with 15( and 30( orientations.

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