In this paper the development and the application of a numerical code suited for the simulation of gas-turbine combustion chambers is presented. In order to obtain an accurate and flexible framework, a finite-rate chemistry model is implemented, and transport equations for all species and enthalpy are solved. An assumed PDF approach takes effects of temperature and species turbulent fluctuations on the chemistry source term into account. In order to increase code stability and to overcome numerical stiffness due to the large-varying chemical kinetics timescales, an implicit and fully-coupled treatment of the species transport equations is chosen. Low-Mach number flow equations and k-ε turbulence model complete the framework, and make the code able to describe the most important physical phenomena which take place in gas-turbine combustion chambers. In order to validate the numerical simulations, experimental measurements are carried out on a generic non-premixed swirl-flame combustor, fuelled with syngas-air mixtures and studied using optical diagnostic techniques. The combustor is operated at atmospheric and high-pressure conditions with simulated syngas mixtures consisting of H2, N2, CH4, CO. The combustor is housed in an optically-accessible combustion chamber to facilitate the application of chemiluminescence imaging of OH* and planar laser-induced fluorescence (PLIF) of the OH-radical. To investigate the velocity field, particle image velocimetry (PIV) is used. The OH* chemiluminescence imaging is used to visualise the shape of the flame zone and the region of heat release. The OH-PLIF is used to identify reaction zones and regions of burnt gas. The fuel composition is modelled after a hydrogen-rich synthesis gas, which can result after gasification of lignite followed by a CO shift reaction and a sequestration of CO2. Actual gas compositions and boundary conditions are chosen so that it is possible to outline differences and similarities among fuels, and at the same time conclusions about flame stability and combustion efficiency can be drawn. A comparison between experimental and numerical data is presented, and main strengths and deficiencies of the numerical modelling are discussed.
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ASME Turbo Expo 2009: Power for Land, Sea, and Air
June 8–12, 2009
Orlando, Florida, USA
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-4883-8
PROCEEDINGS PAPER
Numerical and Experimental Investigation of a Semi-Technical Scale Burner Employing Model Synthetic Fuels
Massimiliano Di Domenico,
Massimiliano Di Domenico
Institute of Combustion Technology, Stuttgart, Germany
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Peter Kutne,
Peter Kutne
Institute of Combustion Technology, Stuttgart, Germany
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Clemens Naumann,
Clemens Naumann
Institute of Combustion Technology, Stuttgart, Germany
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Juergen Herzler,
Juergen Herzler
Institute of Combustion Technology, Stuttgart, Germany
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Rajesh Sadanandan,
Rajesh Sadanandan
Institute of Combustion Technology, Stuttgart, Germany
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Michael Stoehr,
Michael Stoehr
Institute of Combustion Technology, Stuttgart, Germany
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Berthold Noll,
Berthold Noll
Institute of Combustion Technology, Stuttgart, Germany
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Manfred Aigner
Manfred Aigner
Institute of Combustion Technology, Stuttgart, Germany
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Massimiliano Di Domenico
Institute of Combustion Technology, Stuttgart, Germany
Peter Kutne
Institute of Combustion Technology, Stuttgart, Germany
Clemens Naumann
Institute of Combustion Technology, Stuttgart, Germany
Juergen Herzler
Institute of Combustion Technology, Stuttgart, Germany
Rajesh Sadanandan
Institute of Combustion Technology, Stuttgart, Germany
Michael Stoehr
Institute of Combustion Technology, Stuttgart, Germany
Berthold Noll
Institute of Combustion Technology, Stuttgart, Germany
Manfred Aigner
Institute of Combustion Technology, Stuttgart, Germany
Paper No:
GT2009-59308, pp. 231-241; 11 pages
Published Online:
February 16, 2010
Citation
Di Domenico, M, Kutne, P, Naumann, C, Herzler, J, Sadanandan, R, Stoehr, M, Noll, B, & Aigner, M. "Numerical and Experimental Investigation of a Semi-Technical Scale Burner Employing Model Synthetic Fuels." Proceedings of the ASME Turbo Expo 2009: Power for Land, Sea, and Air. Volume 2: Combustion, Fuels and Emissions. Orlando, Florida, USA. June 8–12, 2009. pp. 231-241. ASME. https://doi.org/10.1115/GT2009-59308
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