Application and Research Based on Advanced Low-Emission Aero-Engine Combustion Chamber Technology in Domestic Large Aircraft

Abstract

The international limits on pollution emissions from civil aviation transportation are becoming more and more stringent. Combustion chambers are the only source of pollution emissions from civil aviation engines. Reducing the amount of pollutant e missions is an important task facing the development of combustion chambers. Low-e mission combustion technology as one of the key technologies of civil aviation engines, it is the core technology that supports the development and market entry of civil aviation engines. In order to study the pressure oscillation characteristics of the low-emission combustion chamber under typical working conditions, the self-excited combustion oscillation characteristic test of the model combustion chamber is carried out. The results show that the local equivalent ratio pulsation is one of the factors that cause combustion instability. By calculating the maximum particle size of the fuel droplets in the secondary atomization state of the fuel, it is found that the change of the fuel droplet size has a direct effect on the local equivalent ratio pulsation at the outlet of the main fuel stage, which causes the amplitude and frequency of the combustion chamber pressure oscillation Variety.