LES of Nonlinear Saturation in Forced Turbulent Premixed Flames

What is it about?

Combustion oscillations can lead to high peak-to-peak pressure amplitude which causes intense vibration and structural damage in aeroengines. When the flow velocity fluctuations affecting the flame are large enough, saturation in the amplitude of heat release occurs. This has important implications on the peak pressure fluctuations and flame dynamics. The paper employs LES to predict the nonlinear saturation of combustion instabilities in an acoustically excited flame, and understand primary mechanism that leads to this behaviour.

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