 |
|
 |
4.3 Low Nox Emissions TechnologyThe environmental elements of NASA's Advanced Subsonic Technology and High Speed Research programs focused on experimental and analytical research to advance the understanding of emissions formation in combustion processes in advanced engine cycles. Engine emittants include oxides of nitrogen, speciation of hydrocarbons (CO, CO2, and UHC, etc.) and sulfur oxides, and carbon-based gaseous or liquid particulates. Experimental work included advanced low-emission low-cost fuel injectors, advanced diagnostics to characterize emissions, and advanced technologies for measuring chemical kinetic and aerosol particulates. Analytical work includes the development of analytical models for turbulence-chemistry interaction, supercritical spray, and radiation.In collaboration with the U.S. industry, NASA has contributed to the advancement of low-emission combustion systems for aircraft engines. A 50 percent reduction in NOx emissions (compared with 1996 ICAO baseline) has been demonstrated in sector combustors for advanced subsonic engines at NASA. A 90 percent reduction in NOx emissions (compared with today's production engines) has been demonstrated in sector combustors for supersonic engines at General Electric. These advanced combustor technologies include lean, direct injection for subsonic engines and lean premixed, prevaporization for supersonic engines.
60 degree, dual annular, TAPS sector built up in test rig. This low pressure sector used to test low power emissions, ignition, and lean stability. Shown in Mod 1 configuration, currently being reconfigured to Mod 2 for testing in April. NASA POC: Dr. Chi-Ming Lee 216-433-3413 Chi-Ming.Lee@grc.nasa.gov
|
 |
|
 |
NASA Headquarters Responsible Official: Code R
Curator: SAIC Information Services http://www.aerospace.nasa.gov |
