Investigations of Turbulent Combustion.

The aim of the research is to increase fundamental understanding of turbulent combustion in gas diffusion and spray flows related to propulsion systems with particular emphasis on the roles of large eddies coherent structures in the turbulence. It is discribed how this objective requires the development of high resolution measurement techniques. Techniques are discribed for the measurement of particule size and velocity by laser anemometer, temperature by computer interfaced thermocouples and flame ionization by ionization probes. The initial results of the investigation are described for the two major areas axisymmetric diffusion flows and fuel sprays. The importance of the initial, near field, region of the diffusion flame is described with emphasis on the influences of heat release anemometry, shows the importance of being able to measure gas velocity, particle velocity and particle size, simultaneously. This permits derivation of temporally averaged size distributions and turbulence-droplet interaction. Author