TY - JOUR

T1 - Laser Diagnostics for the Model Development in Turbulent Premixed Flames

AU - Dinkelacker, Friedrich

AU - Pfadler, Sebastian

AU - Leipertz, Alfred

N1 - Funding information: The described work has been done together with several coworkers, which we want to acknowledge: M. Schäfer, A. Buschmann, J. Wolfrum, D. Hofmann, A. Soika, D. Most, V. Höller, M. Löffler, F. Beyrau, J. Kerl, J. Scheuerlein. The authors also gratefully acknowledge funding of parts of this work by the Arbeits-gemeinschaft TECFLAM, the Bavarian Forschungsverbund turbulente Verbren-nung (FORTVER), the German National Science Foundation (DFG) and the Erlangen Graduate School in Advanced Optical Technologies (SAOT).

PY - 2009/9/25

Y1 - 2009/9/25

N2 - The interaction of turbulent flow and chemical processes is complex. Due to the strong turbulent fluctuations on very small scales, a direct insight into the processes has not been possible for long time. New laser diagnostics with sufficient spatial and temporal resolution allow now the answer to long discussed questions, for instance concerning the contradictory ideas of thin or thickened flame fronts in turbulent premixed combustion. More and more also numerical models allow the combined calculation of the local processes describing turbulent flow and combustion reaction. However, often unknown terms coming from the averaging procedure of the turbulence models need to have closures. Advanced application of the planar PIV measurement technique allowed the velocity field evaluation conditioned to the either unburnt or burnt gas state in turbulent premixed flames. Herewith, the direct evaluation of unclosed model terms has been possible for both RANS models as well as for models for the large-eddy simulation method. The mutual interaction of advanced laser diagnostics and numerical models is seen as one of the milestones for the development of advanced technical combustion.

AB - The interaction of turbulent flow and chemical processes is complex. Due to the strong turbulent fluctuations on very small scales, a direct insight into the processes has not been possible for long time. New laser diagnostics with sufficient spatial and temporal resolution allow now the answer to long discussed questions, for instance concerning the contradictory ideas of thin or thickened flame fronts in turbulent premixed combustion. More and more also numerical models allow the combined calculation of the local processes describing turbulent flow and combustion reaction. However, often unknown terms coming from the averaging procedure of the turbulence models need to have closures. Advanced application of the planar PIV measurement technique allowed the velocity field evaluation conditioned to the either unburnt or burnt gas state in turbulent premixed flames. Herewith, the direct evaluation of unclosed model terms has been possible for both RANS models as well as for models for the large-eddy simulation method. The mutual interaction of advanced laser diagnostics and numerical models is seen as one of the milestones for the development of advanced technical combustion.

KW - Combustion

KW - Laser diagnostics

KW - Premixed flames

KW - Turbulent flow

UR - http://www.scopus.com/inward/record.url?scp=68849100581&partnerID=8YFLogxK

U2 - 10.1524/zpch.2009.6041

DO - 10.1524/zpch.2009.6041

M3 - Article

AN - SCOPUS:68849100581

VL - 223

SP - 481

EP - 502

JO - Zeitschrift fur Physikalische Chemie

JF - Zeitschrift fur Physikalische Chemie

SN - 0942-9352

IS - 4-5

ER -