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- W2320372130 abstract "The quest to improve our understanding of combustion is continual, and one aspect of it is the search for computational models. Such models are less detailed than the actual physics of the system, but should aim to captuie the essence of rhese processes. In turn the models may provide a greater understanding of the processes involved and provide us with the ability to predict the behaviour of specific combustion systems. In the present work we investigate the use of two different Large Eddy Simulation (LES) combustion models: (i) a flame-wrinkling LES combustion model in which transport equations for a reaction coordinate, a modelled flame-wrinkling density and the laminar flame speed are solved for, and (ii) a Monotonically Integrated LES (MILES) approach, in conjunction with global chemistry modeling. Comparison and validation studies are performed in a combustion tunnel with rectangular cross-section and a step expansion involving a premixed propane-air flame with equivalence ratio @=0.57 emulating conditions in laboratory studies from which reference data is available. Research progress is reported based on the analysis of data generated in both, non-reactive and reactive simulations. Introduction Turbulent combustion is a highly complex process which affects everyday life. The quest to understand the physical processes better is continual, and one asnn,T+ nf ;t :c rho, onnrnl. fr... ,,m.....r~t:c...,l -.-.A,ln 6,. y’vvc “L xc 10 UI” c3ULuUII L”I k.“I‘I~uLaII”“aI ,,,“U~,J C” describe the processes involved. A simulation model for turbulent combustion must provide treatment for turbulence, chemical reactions, volume expansion, heat release and their interactions, since combustion alters the properties of the fluid and drives the flow, and the flow affects the mixing of species and thus influences the reaction rates, [l]. Although it is a valuable research tool from which much can be learnt, Direct Numerical Simulation (DNS) is not possible in general, except for building-block flows [2-31 with global or reduced reaction mechanisms. For reacting flow problems of practical interest it is generally necCopyright" @default.
- W2320372130 created "2016-06-24" @default.
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- W2320372130 date "2000-01-10" @default.
- W2320372130 modified "2023-09-26" @default.
- W2320372130 title "Large eddy simulation of premixed turbulent flow in a rearward-facing-step combustor" @default.
- W2320372130 cites W1517203877 @default.
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- W2320372130 doi "https://doi.org/10.2514/6.2000-863" @default.
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