Self-exited oscillation in a combustion chambber driven by phase change in the liquid fuel feed system
Hassa, C. and Heinze, J. and Meier, U. and Heeger, Ch. and Trunk, Ph. and Dreizler, A. (2011) Self-exited oscillation in a combustion chambber driven by phase change in the liquid fuel feed system. International Journal of Spray and Combustion Dynamics, 3 (4), pp. 273-284. Multi Science & Technology. ISSN 1756-8277.
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A new mechanism for the generation of a self-exited oscillation of combustion in a generic combustion chamber typical for aeroengine combustors is described. The cause of the oscillation is the phase change from liquid to vapour which happens when the preheat temperature of the air flowing through the burner exceeds the boiling temperature at the operating pressure and the fuel flow is so low that heat transfer to the liquid fuel causes evaporation within the fuel channels of the burner. Liquid fuel and vapour alternatively enter the airstream of the burner. This leads to an unstable situation for the flame. Measurements of chemiluminescence and liquid fuel show nearly complete extinction and re-ignition for the limit cycle. Prevention of the oscillation is possible by better thermal management of the fuel path.
|Title:||Self-exited oscillation in a combustion chambber driven by phase change in the liquid fuel feed system|
|Journal or Publication Title:||International Journal of Spray and Combustion Dynamics|
|In ISI Web of Science:||Yes|
|Page Range:||pp. 273-284|
|Publisher:||Multi Science & Technology|
|Keywords:||Combustion oscillation, phase change, liquid fuel|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Aeronautics|
|HGF - Program Themes:||L ER - Engine Research|
|DLR - Research area:||Aeronautics|
|DLR - Program:||L ER - Engine Research|
|DLR - Research theme (Project):||L - Combustion Chamber Technologies|
|Institutes and Institutions:||Institute of Propulsion Technology > Engine Measurement Systems|
Institute of Propulsion Technology > Combustor
|Deposited By:||Dr.-Ing. Christoph Hassa|
|Deposited On:||21 Nov 2011 12:51|
|Last Modified:||26 Feb 2013 15:04|
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