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Investigation of Combustion Oscillations in a lean Gas Turbine Model Combustor

Diers, Olaf and Schneider, Denis and Voges, Melanie and Weigand, Peter and Hassa, Christoph (2007) Investigation of Combustion Oscillations in a lean Gas Turbine Model Combustor. In: ASME Turbo Expo 2007. ASME. ASME Turbo Expo 2007: Power for Land, Sea and Air, 2007-05-14 - 2007-05-17, Montreal, Kanada.

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This contribution is a continuation of ASME-GT2006-90300. While still working at atmospheric pressure, the range of operating conditions was extended to more realistic reduced mass flows to reproduce the engine pressure loss and air preheat up to 700K. The thermoacoustic behaviour of the burner was mapped over that operating range. Two different types of oscillations were observed for flames anchored at the nozzle or lifted from it. Both exhibited a frequency dependence on the Strouhal number for constant reduced mass flows. For a selected operating point with the lifted flame at a preheat temperature of 600K and a reduced mass flow of 0.3kg K0.5/(s bar), the thermoacoustic behaviour of the burner was characterised by phase locked Particle Image Velocimetry as well as phase locked OH- and OH-T- LIF measurements and correlated to the acoustic pressure signal obtained by microphones. The combined data showed pulsating combustion being supported through periodic reignition of the main flame zone by a recirculating volume of hot, OH-rich gas, the cycle time being connected to the observed frequency. The characterization of the preheated operating point was completed with a heat balance investigation quantifying the non-adiabatic combustion conditions of the uncooled combustor.

Document Type:Conference or Workshop Item (Paper)
Title:Investigation of Combustion Oscillations in a lean Gas Turbine Model Combustor
AuthorsInstitution or Email of Authors
Schneider, DenisUNSPECIFIED
Hassa, ChristophUNSPECIFIED
Date:May 2007
Journal or Publication Title:ASME Turbo Expo 2007
Refereed publication:Yes
In ISI Web of Science:No
Series Name:GT2007-27360
Keywords:Combustor, combustion, gasturbine, thermoacoustic, oscillations, combustion oscillations, limit cycle, PIV, OH-LIF
Event Title:ASME Turbo Expo 2007: Power for Land, Sea and Air
Event Location:Montreal, Kanada
Event Type:international Conference
Event Dates:2007-05-14 - 2007-05-17
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Propulsion Systems
DLR - Research area:Aeronautics
DLR - Program:L TT - Triebwerkstechnologien
DLR - Research theme (Project):L - Low-Emission Air Traffic (old)
Location: Köln-Porz , Stuttgart
Institutes and Institutions:Institute of Combustion Technology > Combustion Diagnostícs
Institute of Propulsion Technology > Engine Measurement Systems
Institute of Propulsion Technology > Combustor
Deposited By: Olaf Diers
Deposited On:18 Jun 2007
Last Modified:27 Apr 2009 13:52

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