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Finite Volume Simulation of High Speed Combustion of Premixed Air‐Acetylene Mixtures in a Microchannel
Author(s) -
Chaudhuri A.,
Guha C.,
Dutta T. K.
Publication year - 2007
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.200600389
Subject(s) - microchannel , finite volume method , combustion , mechanics , microscale chemistry , volume (thermodynamics) , acetylene , work (physics) , thermodynamics , materials science , hypersonic speed , chemistry , physics , mathematics education , mathematics , organic chemistry
High speed combustion characteristics of premixed stoichiometric air‐acetylene mixtures inside microchannels are numerically studied by solving a Navier‐Stokes (NS) system of equations with a single‐step chemistry model. A two dimensional explicit finite volume solver has been developed using modified advection upwind splitting methods (AUSM+) to predict the complex interactions among hydrodynamic processes, shock structures and combustion in microdimensions. The effects of channel aspect ratio and wall temperature on high speed microcombustion have been studied in this work. The increase in wall temperature due to wall friction in reduced dimensions initiates the chemical reaction of the combustible mixture near the wall region, and the reacted zone reaches the centerline for smaller height‐to‐length ratios of the microchannels. The wall temperature plays an important role in hypersonic combustion at the microscale.