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INVESTIGATION OF THE REACTING FLOW FIELD OF A LEAN BURN INJECTOR WITH VARYING DEGREE OF SWIRL AT ELEVATED PRESSURE CONDITION

Hassa, Christoph and Meier, Ulrich and Heinze, Johannes and Magens, Eggert and Schroll, Michael and Bagchi, Imon-Kalyan (2017) INVESTIGATION OF THE REACTING FLOW FIELD OF A LEAN BURN INJECTOR WITH VARYING DEGREE OF SWIRL AT ELEVATED PRESSURE CONDITION. In: Proceedings of the ASME Turbo Expo. ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition, 24.-28.6.2017, Charlotte, NC, USA.

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Abstract

Two RR Lean Direct Injection (LDI) injector versions with different amounts of pilot swirl were investigated. Experiments, performed at elevated pressure and temperature, corresponding to engine conditions at idle include Mie scattering. LII and absorption measurements are used for soot concentration within the primary zone. The soot emission at the outlet is measured by an SMPS instrument. These experimental studies are complemented with PIV measurements. The acquired data allows evaluation of the combustion process from the liquid phase, followed by evaporation, reaction and finally soot production with high spatial resolution. The change of swirl produced rather moderate changes in the flow field, nevertheless qualitative changes in the fuel placement were observed. Starting from there, differences in heat release and soot formation can be explained, which lead to larger changes of soot emission. These observations show that a good knowledge of the interaction of gas and liquid phase is necessary to predict the occurrence of behavioral changes in the operating regime.

Item URL in elib:https://elib.dlr.de/113306/
Document Type:Conference or Workshop Item (Speech)
Title:INVESTIGATION OF THE REACTING FLOW FIELD OF A LEAN BURN INJECTOR WITH VARYING DEGREE OF SWIRL AT ELEVATED PRESSURE CONDITION
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Hassa, ChristophChristoph.Hassa (at) dlr.deUNSPECIFIED
Meier, UlrichUlrich.Meier (at) dlr.deUNSPECIFIED
Heinze, JohannesJohannes.Heinze (at) dlr.deUNSPECIFIED
Magens, EggertEggert.Magens (at) dlr.deUNSPECIFIED
Schroll, MichaelMichael.Schroll (at) dlr.dehttps://orcid.org/0000-0003-0736-546X
Bagchi, Imon-Kalyanrolls-royce deutschlandUNSPECIFIED
Date:27 June 2017
Journal or Publication Title:Proceedings of the ASME Turbo Expo
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
Status:Published
Keywords:Combustion, Lean Burn, Swirl, Laser Measurements
Event Title:ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition
Event Location:Charlotte, NC, USA
Event Type:international Conference
Event Dates:24.-28.6.2017
Organizer:ASME International Gas Turbine Institute
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
Institute of Propulsion Technology > Engine Measurement Systems
Deposited By: Hassa, Dr.-Ing. Christoph
Deposited On:24 Jul 2017 11:07
Last Modified:05 Feb 2018 10:48

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