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Exploration of supersonic confined mixing layer: Effect of dissimilar gases at different temperatures

Javed, Afroz and Paul, PJ and Rajan, NKS and Chakraborty, Debasis (2014) Exploration of supersonic confined mixing layer: Effect of dissimilar gases at different temperatures. In: PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART G-JOURNAL OF AEROSPACE ENGINEERING, 228 (12). pp. 2255-2265.

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Official URL: http://dx.doi.org/ 10.1177/0954410013513680

Abstract

The growth rate of high-speed mixing layer between two dissimilar gases is explored through the model free simulation results. To analyse the cause for the higher mixing layer growth rate in comparison to the existing values reported in literature, the results were compared with the model free simulations of mixing of two high-speed streams of nitrogen (similar gas) at matched temperature and density. The analysis indicates that pressure and density fluctuations no longer remain correlated completely for the mixing layer formed between two dissimilar gases at different temperatures in contrast to the complete pressure density correlation for similar gases. It has been observed that the correlation between temperature and density fluctuations is near -1.0 for dissimilar gases in the mixing layer region and is much higher than for similar gases. It is concluded that mixing layer of similar gases shows a decrease in growth rate due to compressibility effect, while that of dissimilar gases shows a decrease due to dominant temperature effect on density.

Item Type: Journal Article
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Additional Information: Copy right for this article belongs to the SAGE PUBLICATIONS LTD, 1 OLIVERS YARD, 55 CITY ROAD, LONDON EC1Y 1SP, ENGLAND
Keywords: Compressible mixing layer; model free simulation; pressure density correlation
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering (Formerly, Aeronautical Engineering)
Date Deposited: 14 Nov 2014 07:27
Last Modified: 14 Nov 2014 07:27
URI: http://eprints.iisc.ernet.in/id/eprint/50265

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