Transport and Interfacial Kinetics in Multiphase Combustion Systems.
Final rept. 15 Feb 94-14 Feb 97,
YALE UNIV NEW HAVEN CT HIGH TEMPERATURE CHEMICAL REACTION ENGINEERING LAB
Pagination or Media Count:
A 3-year program of research oriented toward the formationtransport of combustion-generated particles is summarized. Using thermophoretic samplingTEM image analysis techniques, both inorganic alumina and carbonaceous soot aggregates have been shown to exhibit quantitatively similar morphologies. A thermophoresis-based method for measuring absolute local soot volume fractions, fv, in flames has been successfully implemented in both co-flow and counterflow laminar diffusion flames. Called Thermocouple Particle Densitometry TPD, it exploits the laws governing thermocouple response to the thermophoretic soot deposition, as first suggested by Eisner and Rosner in 1985. This method is independent of often unknown soot optical properties, unbiased with respect to soot morphology and size distribution, and yields spatially resolved fv values directly even at low soot concentrations below 0.1 ppm. Accordingly, while neither instantaneous or non-intrusive, it is especially applicable to spatially non-uniform andor lightly sooting laminar steady flames. Ancillary studies of the transport properties of soot aggregates, and particle impaction on cylinders in high-speed crossflow are also describeddocumented among the 30 cited references emerging from this programSection 5.
- Combustion and Ignition
- Jet and Gas Turbine Engines