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A plasma-assisted combustion (PAC) test platform for annular combustor was developed to validate the feasibility of using plasma-assisted combustion actuation to reduce emission levels. Combustor outlet temperature and emission levels of O2, CO2, H2, CO, and NOx were measured by using a thermocouple and a Testo 350-Pro Flue Gas Analyzer respectively. Combustor combustion efficiency was also calculated. The effects of duty ratio, feedstock airflow rate, and actuator position on combustion efficiency and emission performance have been analyzed. The results show that the target of CO and NOx emissions reduction in plasmaassisted combustion could not be fully achieved for kerosene/air mixture with different combustor excessive air coefficients. It is also shown that PAC with dilution air hole actuation is superior to that of secondary air hole actuation for the combustion of liquid-kerosene fuel. Besides, plasmaassisted combustion effect is more obvious with an increase of duty ratio or feedstock airflow rate. These results are valuable for the future optimization of kerosene-fueled aero-engine when using plasma-assisted combustion devices to improve emission performance of annular combustor.

Emission characteristics of aviation kerosene combustion in aero-engine annular combustor with low temperature plasma assistance