The exhaust emissions of several different models of gas turbine engines under development or in production were measured. The emissions measured were carbon dioxide, carbon monoxide, unburned hydrocarbons, and the oxides of nitrogen. The results are presented in a generalized form relating emissions to fuel air ratio and engine power or thrust. Techniques were developed to convey exhaust samples from engines in test cells to analysis equipment located elsewhere. Measurements were also made of the emissions from a gas turbine engine installed in a vehicle. Gas turbine engines are inherently low polluters in carbon monoxide and unburned hydrocarbons compared to other types of engines of the same power output. Transient engine operation produces many times the CO and hydrocarbon emission that steady state operation produces. Part load engine operation produces more CO and hydrocarbon emission than full load. The opposite is true of the oxides of nitrogen. The oxides of nitrogen are the most serious emission problem of gas turbine engines with respect to proposed emission controls. Satisfactory methods have been developed in this program for sampling exhaust pollutants from a variety of gas turbine engines. A heated sampling system is necessary to prevent deterioration of the unburned hydrocarbon sample between engine and analyzer. (Author)

"PB193479."