Preliminary Work for Identifying and Tracking Combustion Reaction Pathways by Coherent Microwave Mapping of Photoelectrons
Technical Report,15 Sep 2014,16 Mar 2016
TENNESSEE UNIV KNOXVILLE KNOXVILLE United States
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This report summarizes our efforts during Sep. 15th 2014-March 15th 2016 period. Four major advances have been achieved 1. See-through-wall Radar technique has been first developed and evaluated in the flow reactor. In situ, see-through-wall measurements of rotational temperature of molecular oxygen have been demonstrated using Radar Resonance Enhanced Multiphoton Ionization REMPI in a quartz flow reactor at atmospheric pressure. Both axial and radial temperature distributions of heated air in flow reactor have been obtained and the results have been verified by computational model. See-through-wall Radar technique shows its prestige on species detection i.e., molecules and radicals with high spatial resolution and in situ measurement results. 2. New flow reactors collaborated with see-through-wall Radar technique has been built and preliminary results of pyrolysis of iso-butane have been obtained. Qualitative measurements of ethylene in pyrolysis products have been conducted by using coherent microwave Rayleigh scattering Radar from Resonance Enhanced Multi-PhotonIonization REMPI. 3. New high-pressure combustion chamber has been built. Measurements of atomic oxygen concentration have been measured at pressures up to 5 bar. New quantitative measurements provide new tools for combustion diagnostics.4. New laser ignition methods have been demonstrated for high-pressure combustion. By utilizing high-power high repetition rate laser, we have demonstrated that an order of magnitude lower individual laser pulses can successfully ignite the fuelair mixture.