Numerical study of the effect of the corrugated baffle on the acoustic characteristics of the combustion chamber

Combustion instability caused by the amplification of sound waves is called acoustic or high-frequency instability, which can cause severe damage to system. Adding baffles one methods passive control. Depending on geometry chamber and type application, different are used. In this research, effect longitudinal corrugated baffle characteristics combustion investigated numerically. The quality each configuration determined examining their influence essential parameters such as natural frequency shift damping factor. Modal harmonic analyses for field conducted investigate installed in chamber. According obtained results, addition shifts resonant frequencies. other words, a combustor with more effective controlling instabilities than that without baffles. addition, it increases factor first–second circumferential (tangential) modes, making system stable. Also, quantitative assessment acoustics adding shows finds better condition from stability point view, bandwidth increase affects stability.