The aim of the research is the fundamental understanding of chemical mechanisms in both the gas phase above the substrate and on the substrate surface, and the understanding of the influence of chemistry and gas-phase fluid dynamics on the growth rates and quality of the deposited diamond films. Potential industrial applications of this research are the coating of tools to increase surface hardness and the design of thin-film heat sinks to increase heat dissipation from computer chips. This research is directed toward a fundamental understanding of the influence of large-scale turbulence on the propagation of turbulent or wrinkled premixed flames. Mathematical conservation equations are solved by a combination of analytical and computational techniques to investigate the role of flame stretch and flame broadening by the turbulent flow. The aim of the research is accurate prediction of the dependence of the average flame speed on the turbulence intensity and Reynolds number of the turbulent reactive flow.
Attention is focused upon droplets that are initially in the millimeter size range.
Droplet components are selected so that their volatilities are significantly different. Experiments will be carried out in the NASA LeRC 2.2 sec drop tower, with data obtained by cine photography of the burning droplets. Films will be analyzed both manually and with digital image processing techniques. Time histories of droplet and flame diameters and other observables will be measured. In conjunction with the experiments, theoretical studies will be undertaken to aid interpretation of the experimental results.