Predictive modelling of turbulent combustion is important for the development of air-breathing engines, internal combustion engines, furnaces and for power generation. Significant advances in modelling non-reactive turbulent flows are now possible with the development of large eddy simulation (LES), in which the large energetic scales of the flow are resolved on the grid while modelling the eff...

A theoretical model for instantaneous PLIF measurements of mole fraction in a shock tunnel ow with pressure gradients and large temperature variations is presented. The model determined the optimum excitation frequency which provided PLIF signal intensity proportional to freestream mole fraction. Experimental PLIF images of a two-dimensional slot scramjet injector with and without hydrogen fuel...

This is a summary of significant accomplishments in investigations on the dispersion, mixing, and combustion in uniformand variable-density air-breathing high-speed propulsion flows related to scramjet propulsion. In experimental work, progress made in the development of testsection modifications allowed inclined-jet injection in supersonic flow to be studied with and without chemical reactions...

This work presents development of an oxygen-based diode laser absorption sensor designed to be used in a supersonic combustion ramjet engine inlet. The sensor uses free-space propagation of light from a vertical-cavity surface-emitting laser (VCSEL) to determine the temperature, velocity and angle of attack of an engine inlet in hypersonic flow. The report outlines the method of calculating the...

A possible next-generation launch vehicle may be a fully reusable, single-stage-to-orbit (SSTO) aerospacecraft. This class of hypersonic vehicle includes highly integrated airframe and propulsion systems, hence fuel-optimal trajectories are of special interest. Also, since these vehicles are neither conventional aircraft nor rockets, the appropriate approach for trajectory analysis during preli...