The demand to reduce CO2 emissions favors the use of alternative hydrogen-rich fuels, which can stem from precombustion carbon capture or power-to-gas technologies. These fuels are characterized by a higher reactivity and reduced ignition delay time compared to natural gas. Therefore, current combustor designs need to be adapted to the new requirements. Numerical modeling greatly assists the further development of such systems. The present study aims to determine how far a sophisticated computational fluid dynamics (CFD) combustion method is able to predict auto-ignition at real engine conditions. Scale-resolving computations of auto-ignition were performed at elevated pressure (15 bar) and intermediate temperatures (>1000 K). The conditions are similar to those occurring in premixing ducts of reheat combustors. A nitrogen-diluted hydrogen jet is injected perpendicularly into a stream of hot vitiated air. The scale-adaptive simulation (SAS) method as proposed by Menter and coworkers has been applied. The chemistry is captured by direct inclusion of detailed kinetics. Subgrid fluctuations of temperature and species are considered by an assumed probability density function (PDF) approach. The results are compared with appropriate experimental reference data. The focus of the present work is set on the identification of the major sources of uncertainty in the simulation of auto-ignition. Despite the very challenging operating conditions, satisfactory agreements could be obtained within experimental uncertainties.
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e-mail: juliane.prause@dlr.de
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October 2015
Research-Article
Sensitivity Analysis of Auto-Ignition Simulation at Gas Turbine Operating Conditions
Juliane Prause,
e-mail: juliane.prause@dlr.de
Juliane Prause
Institute of Combustion Technology
,German Aerospace Center (DLR)
,Pfaffenwaldring 38-40
,Stuttgart 70569
, Germany
e-mail: juliane.prause@dlr.de
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Berthold Noll,
Berthold Noll
Institute of Combustion Technology
,German Aerospace Center (DLR)
,Pfaffenwaldring 38-40
,Stuttgart 70569
, Germany
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Manfred Aigner,
Manfred Aigner
Institute of Combustion Technology
,German Aerospace Center (DLR)
,Pfaffenwaldring 38-40
,Stuttgart 70569
, Germany
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Khawar Syed
Khawar Syed
Alstom (Switzerland) Ltd.
,Zentralstrasse 40
,Birr 5242
, Switzerland
Search for other works by this author on:
Juliane Prause
Institute of Combustion Technology
,German Aerospace Center (DLR)
,Pfaffenwaldring 38-40
,Stuttgart 70569
, Germany
e-mail: juliane.prause@dlr.de
Berthold Noll
Institute of Combustion Technology
,German Aerospace Center (DLR)
,Pfaffenwaldring 38-40
,Stuttgart 70569
, Germany
Manfred Aigner
Institute of Combustion Technology
,German Aerospace Center (DLR)
,Pfaffenwaldring 38-40
,Stuttgart 70569
, Germany
Khawar Syed
Alstom (Switzerland) Ltd.
,Zentralstrasse 40
,Birr 5242
, Switzerland
Contributed by the Turbomachinery Committee of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received December 4, 2014; final manuscript received January 21, 2015; published online March 31, 2015. Editor: David Wisler.
J. Eng. Gas Turbines Power. Oct 2015, 137(10): 102601 (7 pages)
Published Online: October 1, 2015
Article history
Received:
December 4, 2014
Revision Received:
January 21, 2015
Online:
March 31, 2015
Citation
Prause, J., Noll, B., Aigner, M., and Syed, K. (October 1, 2015). "Sensitivity Analysis of Auto-Ignition Simulation at Gas Turbine Operating Conditions." ASME. J. Eng. Gas Turbines Power. October 2015; 137(10): 102601. https://doi.org/10.1115/1.4029930
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