Comparison of Exhaust Emissions of a Low-Time JT8D-11Engine:High-Smoke Versus Low-Smoke Combustion Chamber Configurations.

摘要

Engine-core exhaust emissions were measured on a low-time JT8D-11engine in both high-smoke and low-smoke configurations. Changing from the high-smoke to the low-smoke configuration considerably reduced the visible smoke, 55to 90percent,as measured using the Society of Automotive Engineers (SAE) smoke number. Carbon monoxide was reduced by up to 40percent. Total unburned hydrocarbons were reduced by 40percent at idle power,while the production of oxides of nitrogen was increased by 60percent at the high power setting. These percentages are absolute with no consideration for time in mode,according to the Environmental Protection Agency (EPA) landing/takeoff cycle. (Author)