Detailed emissions measurements were made throughout the plumes of J85-5 and J79-15 engines at military power and three afterburning power levels. Calculations of integrated pollutant flow rates at various axial stations showed that hydrocarbons are most reactive in the plume, with significant decreases observed at all afterburning power levels. Carbon monoxide can either increase or decrease with axial distance in the plume, depending on the power level and the hydrocarbon ...
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