Numerical Simulation of Turbulent Combustion Using Vortex Methods
Abstract
During the course of this year, we have concentrated on the validation of the transport element method in two dimensions and its extension to: three dimensional flow, to reacting flow with finite Arrhenius rates, and to variable-density flow including the effect of gravity. Comparisons with experimental data on a reacting shear layer with low heat release show that the numerical results agree very closely with the measurements of the velocity statistics, the passive scalar statistics, the product formation rate and the product thickness. Numerical studies are used to establish the dependence of the product formation rate on the Reynolds number, the Lewis number and the Damkohler number. Studies of a variable-density flow focused on the effects of density gradients on the structure of turbulence in both the momentum driven and gravity-driven reacting flow. In particular, how does heat release change the rates of growth and mixing within the layer via the impact of the expansion field and the baroclinic vorticity generation due to the density gradients. For this purpose, examples of a horizontal premixed reacting shear layer and a vertical jet diffusion flame are analyzed. Numerical simulation, Turbulent combustion, Vortex methods.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 27, 1988
- Accession Number
- ADA204260
Entities
People
- Ahmed F. Ghoniem
Organizations
- Massachusetts Institute of Technology