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Formation and Emission of Nitrogen Oxide in Gas Turbine Engines: Plume Effluent Characteristics of TF3O-P111+ and TF33-P9 Engines.

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Final technical rept. 1 Nov-17 Dec 93,

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Phase I of this project focused on the creation of a spatial emissions map of the plume effluent in the exhaust stream directly behind the engine in a jet engine test cell JETC. Both afterburning TF30-P111 and non-after-burning TF33-P9 engines were tested. Measurements were taken in conjunction with actual engine tests for validity of the data. Temperature, oxides of nitrogen NOx, carbon monoxide CO concentration, and velocity were among the characteristics measured radially and axially in the plume for each engine type. The main focus of this study was on NOx, consisting of nitric oxide NO and nitrogen dioxide NO2. Measurements in the P111 plume reveal levels of NOx above 300 ppm along the centerline of the effluent. A dip in the NOx emissions at afterburner shows signs of a reburning andor dilution effect by the atmospheric combustion in the effluent. Significant amounts of NO2 are present in the effluent over the entire power range. Temperatures at military power reach 1100 deg F along the centerline, and CO values are below 80 ppm. Carbon monoxide concentrations decrease from idle to military power full power, no afterburner, then rise sharply in afterburner. The CO peaks shift outward from centerline as do the temperatures due to the radial geometry of the afterburner combustion over 10 percent CO at 2850 deg F.

Subject Categories:

  • Inorganic Chemistry
  • Combustion and Ignition
  • Jet and Gas Turbine Engines

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