Development of Emissions Measurement Techniques for Afterburning Turbine Engines
Final technical rept. 1 Apr 1973-31 Mar 1975
GENERAL ELECTRIC CO CINCINNATI OH AIRCRAFT ENGINE BUSINESS GROUP
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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 contents. No significant change in total oxides of nitrogen was observed at any power level. A computerized analytical plume model was developed and verified, which considers the simultaneous mixing and chemical reaction processes that can occur in the plumes of afterburning engines. The model enables calculating local concentrations of the various exhaust gases at any axial or radial location from initial values measured at the exhaust plane. A procedure for afterburning engine emissions measurements was developed.
- Physical Chemistry
- Combustion and Ignition