Technical Paper
Research on the Flame Structure Characteristics of Methane/Air Turbulent Premixed Flame
2020-09-11
2020-01-5075
Experiments of the methane/air turbulent premixed combustion under different turbulence intensities are conducted in a constant combustion bomb to investigate the effect of turbulence intensity on the flame structure characteristics. Fourier transform is adopted to extract detailed information of disturbance acting on the flame front of the methane/air turbulent premixed flame. The results indicate that the fluctuation radius presented an increasing trend as a whole with the development of the flame, and the flame stretch rate gradually decreases. With the increase of turbulence intensity, the disturbance of the flame front increases obviously, which makes the structure of the flame front more complex, and the correlation coefficient of the flame at the same radius decreases gradually.