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Experimental Investigation of a RQL Burner with Jet in Cross Flow Fuel Injection - Characterization of the Reating Flow Field at Realistic Operating Conditions

Soworka, Thomas and Behrendt, Thomas and Hassa, Christoph and Heinze, Johannes and Magens, Eggert and Schroll, Michael and di Mare, Francesca and Ballantyne, Steven and Gregory, Jon (2019) Experimental Investigation of a RQL Burner with Jet in Cross Flow Fuel Injection - Characterization of the Reating Flow Field at Realistic Operating Conditions. In: Proceedings of the ASME Turbo Expo. ASME Turbo Expo 2019: Turbomachinery Technical Conference and Exposition, 17-21. Jun. 2019, Phoenix, Arizona, USA.

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Future rich-burn/quick-quench/lean-burn (RQL) burners for aero engines face the challenge to further reduce the emission of soot. Alternative ways of fuel injection are therefore in the focus of modern RQL combustion systems. This contribution aims to investigate experimentally the influence of fuel injection on the reacting flow field, with the emphasis on soot production in the primary zone. For the test, a Rolls-Royce prototype burner was used in two different configurations which differ only in the axial location of jet in cross flow fuel injection and thereby provoke different ways of fuel atomization. In the upstream configuration the burner features characteristics of a pre-filming airblast atomizer. Whereas with the fuel tip in downstream position solely Jet-in-Cross-Flow fuel atomisation is expected. The burner was tested at realistic aero engine combustor conditions (p30=9.28 bar, T30=603 K, AFR=7.6). Several optical measurement techniques were used to characterise the reacting flow field. Their difficult application in a rich burn environment is described briefly. The structure of the reacting flow field is illustrated by ParticleImage-Velocimetry (PIV). Planar Mie scattering and Planar Laser-Induced Fluorescence (PLIF) are used to characterise the placement of liquid and gaseous fuel respectively. The location and structure of heat release zones are captured in terms of OH* and CO2* chemiluminescence. Finally LaserInduced-Incandescence (LII) is used to obtain three dimensional soot distributions in the primary zone. On this basis 20% less soot was measured for the upstream configuration at the axial location of maximal soot concentration. This remarkable difference could be attributed to the different placement of liquid fuel and the resulting better mixing.

Item URL in elib:https://elib.dlr.de/128442/
Document Type:Conference or Workshop Item (Speech)
Title:Experimental Investigation of a RQL Burner with Jet in Cross Flow Fuel Injection - Characterization of the Reating Flow Field at Realistic Operating Conditions
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Soworka, ThomasUNSPECIFIEDhttps://orcid.org/0009-0005-8443-8847UNSPECIFIED
Behrendt, ThomasUNSPECIFIEDhttps://orcid.org/0000-0002-4154-3277UNSPECIFIED
Schroll, MichaelUNSPECIFIEDhttps://orcid.org/0000-0003-0736-546XUNSPECIFIED
di Mare, FrancescaDLR, Institute of Propulsion TechnologyUNSPECIFIEDUNSPECIFIED
Date:20 June 2019
Journal or Publication Title:Proceedings of the ASME Turbo Expo
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Combustor, RQL, Experiments at realistic operating conditions, Effects of jet-in-cross-flow fuel injection on soot formation in primary zone, Laser diagnostics (Mie, Chemiluminescence, AH-PLIF, LII), SSC test rig (EDS)
Event Title:ASME Turbo Expo 2019: Turbomachinery Technical Conference and Exposition
Event Location:Phoenix, Arizona, USA
Event Type:international Conference
Event Dates:17-21. Jun. 2019
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 (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Propulsion Technology > Combustor
Institute of Propulsion Technology > Engine Measurement Systems
Deposited By: Soworka, Thomas
Deposited On:22 Aug 2019 08:48
Last Modified:29 Mar 2023 00:42

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