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Flow structure and heat transfer characteristics behind a diaphragm in the presence of a diffusion flame

Yogesh, GP and Raghunandan, BN (1989) Flow structure and heat transfer characteristics behind a diaphragm in the presence of a diffusion flame. In: International Journal of Heat and Mass Transfer, 32 (1). 19 -28.

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Official URL: http://dx.doi.org/10.1016/0017-9310(89)90087-2

Abstract

The characteristics of the separated flow behind a diaphragm over a burning surface are investigated experimentally. This complex problem of practical significance involving recirculation, blowing and combustion reactions is studied in a two-dimensional combustion tunnel. The flame structure, recirculation patterns and heat transfer to the surface are presented for a range of values of free stream and fuel injection velocities as well as for different heights of the diaphragm. The trends of heat transfer vs axial distance are shown to be similar to those resulting from a non-reactive heated stream with a diaphragm. Treating the case of a boundary layer diffusion flame as that corresponding to the zero height of the diaphragm, the heat transfer augmentation due to recirculation is estimated. It is found that at considerable downstream distances (xfh > 3), the heat transfer rates with diaphragm overtake the rates from a developing boundary layer case. Flow visualization studies with particle track photography show that there are many similarities between the reactive and the non-reactive cases.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier science.
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering (Formerly, Aeronautical Engineering)
Date Deposited: 19 Oct 2010 09:22
Last Modified: 19 Oct 2010 09:22
URI: http://eprints.iisc.ernet.in/id/eprint/33175

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