NDLI: Vortex-scalar element calculations of a diffusion flame stabilized on a plane mixing layer

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Vortex-scalar element calculations of a diffusion flame stabilized on a plane mixing layer

Content Provider	NASA Technical Reports Server (NTRS)
Author	Ghoniem, Ahmed F. Givi, Peyman
Copyright Year	1987
Description	The vortex-scalar element method, a scheme which utilizes vortex elements to discretize the region of high vorticity and scalar elements to represent species or temperature fields, is utilized in the numerical simulations of a two-dimensional reacting mixing layer. Computations are performed for a diffusion flame at high Reynolds and Peclet numbers without resorting to turbulence models. In the nonreacting flow, the mean and fluctuation profiles of a conserved scalar show good agreement with experimental measurements. Results for the reacting flow indicate that for temperature independent kinetics, the chemical reaction begins immediately downstream of the splitter plate where mixing starts. Results for the reacting flow with Arrhenius kinetics show an ignition delay, which depends on reactant temperature, before significant chemical reaction occurs. Harmonic forcing changes the structure of the layer, and concomitantly the rates of mixing and reaction, in accordance with experimental results. Strong stretch within the braids in the nonequilibrium kinetics case causes local flame quenching due to the temperature drop associated with the large convective fluxes.
File Size	1602583
Page Count	26
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19870019068
Archival Resource Key	ark:/13960/t9p31s514
Language	English
Publisher Date	1987-08-01
Access Restriction	Open
Subject Keyword	Aeronautics (general) Temperature Distribution Turbulent Flow Diffusion Flames Vortices Turbulence Models Reynolds Number Flow Distribution Vorticity Scalars Flame Propagation Mixing Layers Fluids Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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