Accession Number : ADA316642

Title :   Controlled Combustion of Toxic Waste Materials in a Compact Dump Combustors.

Descriptive Note : Final technical rept. 15 Oct 94-31 Dec 95,

Corporate Author : GEORGIA INST OF TECH ATLANTA SCHOOL OF AEROSPACE ENGINEERING

Personal Author(s) : Menon, Suresh

PDF Url : ADA316642

Report Date : FEB 1996

Pagination or Media Count : 8

Abstract : A large-eddy simulation (LES) model was developed to simulate waste injection and combustion in a compact dump combustor. The configuration and the dimensions of the modeled was chosen to correspond identically to the experimental device. The first phase of the study investigated non- reacting fuel-air mixing in the combustor. The fuel (here considered to represent the waste) was injected using both passive and active control of the injection process. The pressure field in the combustor was used as a sensor and the fuel was injected both in-phase and out-of-phase with the local (at the dump plane) pressure oscillation. Results showed that when fuel (or waste) is injected in-phase with the local pressure oscillation (that is when the pressure is higher than the mean). then significantly enhanced entrainment of the fuel into the large coherent structures in the shear layer can occur. Engulfment of the waste into the vortices can increase the waste residence time in the combustor and hence increase its consumption. Results with and without heat release confirm this observation - results are in good agreement with the observation in the laboratory.

Descriptors :   *EDDIES(FLUID MECHANICS), *COMBUSTORS, *FUELS, SHEAR PROPERTIES, CONTROL, SIMULATION, INJECTION, LAYERS, MATERIALS, TOXICITY, STRUCTURES, COHERENCE, PASSIVE SYSTEMS, VORTICES, COMBUSTION, PRESSURE, FUEL AIR RATIO, WASTES, OSCILLATION, ENTRAINMENT, EDDY CURRENTS, VARIABLE PRESSURE.

Subject Categories : Mechanics
      Combustion and Ignition
      Fuels

Distribution Statement : APPROVED FOR PUBLIC RELEASE