Influence of sound absorbing surfaces on acoustic oscillations and flame acceleration in hydrogen_air mixture

31st International Conference on Equations of State for Matter

Korobov, A.E.^1 ; Volodin, V.V.^1 ; Golovastov, S.V.^1

Joint Institute for High Temperatures, Russian Academy of Sciences, Izhorskaya 13, Moscow

125412, Russia^1

关键词: Accelerating flames;    Acoustic disturbances;    Acoustic oscillation;    Axially symmetric;    Experiment condition;    Flame accelerations;    Hydrogen-air mixture;    Sound-absorbing surfaces;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/774/1/012090/pdf
DOI  :  10.1088/1742-6596/774/1/012090

来源: IOP

【 摘 要 】

The frequency spectrum of acoustic disturbances that are emitted by accelerating flame front in an air-hydrogen mixture within an axially symmetric channel with a uniform cross section is experimentally determined. The effect of acoustic disturbances that are reflected from the closed end of the combustion chamber on the flame front acceleration is studied. It is revealed that the frequency spectrum of generated acoustic disturbances under experiment conditions has maximums at frequencies close to 250, 800, and 1500 Hz.