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Self-Exited Oscillation in a Combustion Chamber Driven by Phase Change in the Liquid Fuel Feed System

Hassa, Christoph and Heinze, Johannes and Meier, Ulrich and Heeger, C. and Trunk, P. and Dreizler, A. (2010) Self-Exited Oscillation in a Combustion Chamber Driven by Phase Change in the Liquid Fuel Feed System. In: n3l Proceedings , pp. 1-9. Lehrstuhl für Thermodynamik TU München. n3l - Int'l Summer Schoool and Workshop on Non-Normal and Nonlinear Effects in Aero- and Thermoacoustics, 17. - 21. Mai 2010 , München.

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Abstract

A new mechanism for the generation of a self-exited oscillation of combustion in a generic combustion chamber typical for aero-engine 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 instable situation for the flame. Measurements of chemiluminescence and liquid fuel show nearly complete extinction and reignition for the limit cycle. Prevention of the oscillation is possible by better thermal management on the fuel path.

Document Type:Conference or Workshop Item (Lecture, Paper)
Title:Self-Exited Oscillation in a Combustion Chamber Driven by Phase Change in the Liquid Fuel Feed System
Authors:
AuthorsInstitution or Email of Authors
Hassa, ChristophAT-BK
Heinze, JohannesAT-TM
Meier, UlrichAT-BK
Heeger, C.TU Darmstadt
Trunk, P.TU Darmstadt
Dreizler, A.Tu Darmstadt
Date:21 May 2010
Journal or Publication Title:n3l Proceedings
Refereed publication:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 1-9
Editors:
EditorsEmail
Polifke, W.Lehrstuhl für Thermodynamik TU München
Publisher:Lehrstuhl für Thermodynamik TU München
Status:Published
Keywords:Gas Turbine, Verbrennungsschwingung, Phasenübergang
Event Title:n3l - Int'l Summer Schoool and Workshop on Non-Normal and Nonlinear Effects in Aero- and Thermoacoustics
Event Location:München
Event Type:Workshop
Event Dates:17. - 21. Mai 2010
Organizer:Lehrstul für Thermodynamik TU München
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Propulsion Systems
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Combustion Chamber Technologies
Location: Köln-Porz
Institutes and Institutions:Institute of Propulsion Technology > Combustor
Deposited By: Dr.-Ing. Christoph Hassa
Deposited On:20 May 2011 13:01
Last Modified:25 Jul 2011 09:41

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