Abstract

A summary is given of the results of research on the mechanism of NO, CO, and HC formation in combustion processes. The major problems investigated were (1) the mechanism of NO and CO formation in engines and burners employing homogeneous premixed charges; (2) the effect of mixing and turbulence on chemical reactions in steady flow burners; and (3) the process of spray formation, vaporization, and mixing in fuel injected engines and burners. Among the most important results of the research were (1) the development of the Rate Controlled Constrained Equilibrium Method for treating chemical reactions in complex gas mixtures; (2) the development of a Stoichastic Mixing Model for calculating the effects of mixing and turbulence on chemical reactions; (3) the identification of jet mixing as the important process governing the dispersion of fuel in fuel-injected engines and burners; and (4) the development of an aerodynamic model for calculating HC emissions due to quench layer entrainment during blow-down and exhaust of a cylinder.

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