Study on combustion instability

Lean premixed combustion technology can reduce NOx emissions from modern gas turbine combustors, but it is highly susceptible to combustion instabilities, which may lead to large pressure fluctuations and structural damages. In our lab the linear model was developed to predict the stability characteristic of a combustion system. The interaction between the flames and acoustic waves was also studied, which may lead to the generation of vorticity and entropy waves.

Dynamic characteristics of swirl flame

Swirling flame is the main combustion form in aero engine. The dynamics of the swirling flame is closely related with the combustion instability, the extinction, and the pollutant emissions. The response of the swirling flame to the acoustic waves, and the interaction between hydrodynamic instability mode and acoustic mode, will be studied by theoretical and experimental methods.