On the sensitivity of soot and thermal radiation simulation results to the adopted PDF for temperature underhighly sooting combustion conditions

Flow Field Behind the Flame Holders in an Isothermal Model of an Afterburner - A Theoretical Study

To achieve a smooth control of the pulverized coal combustion behavior of an aggregate drying pulverized coal burner, a gear-shaped combustion stabilization device was added to the end of primary t...

Design of Gear-type Combustion Stabilizer under Benign Control of Pulverized Coal Combustion Behavior

A computational procedure is described for the calculation of isothermal flow fields of two-ring flame stabilizers in practical afterburners and also for the reacting flow parameters in a research afterburner. The predictions have been obtained using a finite volume solution procedure for the steady three-dimensional elliptic equations of fluid flow. The physical models include the κ-e turbulence model, eddy breakup model, two-step reaction model, droplet vaporization and combustion model, and six-flux radiation model. The presence of radial gutters and staggering the distance between two-ring gutters alter the afterburner flow patterns considerably, including the elimination of diffuser stall and flow separation losses near the diffuser. The predicted and measured emissions in the research afterburner geometry agree qualitatively. The effect of the fuel to air ratio and location of the fuel injector on the temperature and species concentration distribution are presented in detail.

S. Sampath

Papers

Numerical analysis of two-ring flame stabilizer flows in aircraft afterburners