Study on plasma combustion process in aero engine combustor

Abstract

In order to explore the effect of plasma combustion on the performance of aeroengine combustion chamber, a simplified 9-Step plasma reaction mechanism was added to the 16 component 25 step reaction mechanism of aviation kerosene, and a kerosene combustion chemical reaction process model considering the excited state relaxation reaction of plasma electron collision reaction and the chemical reaction involved in excited state was established, The numerical calculation of combustion process in combustion chamber was carried out, and the numerical calculation results of combustion process with and without plasma combustion support were compared and analyzed. The results showed that after adding plasma in the combustion chamber, the active particles produced by plasma reaction made kerosene burn more fully in the main combustion zone. Under the appropriate chemical ratio, the average temperature of the outlet section of the combustion chamber increases from 2208.5K to 2543.5K, and the combustion efficiency increases by 11% to 95.6% on the basis of 84.6%; The outlet temperature field was more uniform, and the temperature distribution coefficient (OTDF) was reduced from 0.131 to 0.111, which improved the performance of the combustion chamber.