Effect of burner geometry and operating conditions on mixing and heat transfer along a combustion chamber
- Cairo Univ., Giza (Egypt). Faculty of Engineering
The present work deals with a burner of a transverse-flow type. In this burner, fuel jets are admitted in a plane normal to the combustion air stream. The effects of the fuel admission angle and the air-fuel ratio on the flame characteristics and the total heat transfer to the walls are investigated experimentally. The fuel admission angle ({Theta}) is designated, in this work, as the angle between the direction of each fuel gun and the radial direction of the burner. Three values of ({Theta}), namely, 0{degree}, 45{degree} and 90{degree} are investigated. The coaxial conventional admission of fuel has been also considered for the sake of comparison. Slightly rich, lean, and overlean flames, expressed by the three air-fuel ratios 15, 20 and 25, respectively, have been studied together with those fuel admission angles. Air is swirled (45{degree} swirler) in the same direction of fuel whirling. However, in some runs it is swirled in the opposite direction, and in some other runs, air is admitted with no-swirl motion. For each run, a complete local mean temperature traverse is recorded. The total heat transfer to the combustion chamber walls is obtained by considering the rates of cooling water flowing through the surrounding cooling rings and their temperature rises. The study shows that using a burner of a transverse-flow with fuel to be admitted with an angle of 45{degree} (among the other tested angles) would result in a flame of highest values of total heat transfer. It also shows that an angle of 0{degree} would offer a flame of shorter length and a relatively lower heat transfer to the surrounding walls.
- OSTI ID:
- 86051
- Report Number(s):
- CONF-941024-; ISBN 0-7918-1213-8; TRN: IM9534%%122
- Resource Relation:
- Conference: 8. COGEN-TURBO power congress and exposition: gas turbines in cogeneration and utility, industrial and independent power generation, Portland, OR (United States), 25-27 Oct 1994; Other Information: PBD: 1994; Related Information: Is Part Of ASME cogen turbo power `94. IGTI-Volume 9; Kidd, H.A.; Cooke, D.H.; Fransson, T.H.; Greitzer, E.M. [eds.]; PB: 759 p.
- Country of Publication:
- United States
- Language:
- English
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