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Influence of Fluidic Control in a Staged Lean Jet Engine Burner on Combustor Performance

Yoshida, Seiji and Hassa, Christoph and Yamamoto, Takeshi and Heinze, Johannes and Schroll, Michael (2019) Influence of Fluidic Control in a Staged Lean Jet Engine Burner on Combustor Performance. Fluids, 4 (188), pp. 1-22. Multidisciplinary Digital Publishing Institute (MDPI). DOI: 10.3390/fluids4040188 ISBN ISSN 2311-5521 ISSN 2311-5521

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Official URL: http://doi.org/10.3390/fluids4040188


To improve the turn-down ratio of a lean combustor, which has the greatest potential for reducing NOx emissions from jet engines, fuel staging is commonly employed. To further extend the stable operation range, air staging with a fluidic element is also considered. The influence of fluidic control on combustion was analyzed to better understand fluidic element-burner interactions. The pressure loss of each fluidic element was determined by measuring the pressure at the element exits. The effect of fluidic control on the atomization, fuel distribution, and flow field was investigated using optical, noninvasive techniques. The combustion performance of the burner with the fluidic element was evaluated using exhaust gas analyses. The pressure losses of the swirlers and fuel mixers were varied depending on the bleed air from the fluidic element. Under the idle condition, the reduction of pressure loss in the pilot fuel mixer resulted in inferior atomization due to the reduced gas velocity around the fuel film, which had a positive effect on lean blowout. Under the cruise condition and the staged mode, the reduction of the pilot air flow increased the equivalence ratio of the lean pilot stage and resulted in higher combustion efficiency.

Item URL in elib:https://elib.dlr.de/130138/
Document Type:Article
Title:Influence of Fluidic Control in a Staged Lean Jet Engine Burner on Combustor Performance
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Hassa, ChristophChristoph.Hassa (at) dlr.deUNSPECIFIED
Heinze, JohannesJohannes.Heinze (at) dlr.deUNSPECIFIED
Schroll, MichaelMichael.Schroll (at) dlr.dehttps://orcid.org/0000-0003-0736-546X
Date:1 November 2019
Journal or Publication Title:Fluids
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In ISI Web of Science:Yes
DOI :10.3390/fluids4040188
Page Range:pp. 1-22
Massoudi, MehrdadCarnegie Mellon University, Pittsburgh, PA 15213-3890, USA
Publisher:Multidisciplinary Digital Publishing Institute (MDPI)
ISBN:ISSN 2311-5521
Keywords:aero engine; combustor; fluidic element; air-flow control; optical measurements; exhaust gas analysis
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:11 Nov 2019 12:04
Last Modified:14 Dec 2019 04:25

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