As part of a continuing study of the environmental effects of solid rocket motor (SRM) operations in the troposphere, a numerical model is used to simulate the afterburning processes occurring in solid rocket motor plumes and to predict the quantities of potentially harmful chemical species which are created. The calculations include the effects of finite-rate chemistry and turbulent mixing. It is found that the amount of NO produced is much less than the amount of HC1 present in the plume, that chlorine will appear predominantly in the form of HC1 although some molecular chlorine is present, and that combustion is complete as is evident from the predominance of carbon dioxide over carbon monoxide.
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