Combustor oscillation attenuation via the control of fuel-supply line dynamics

摘要

Combustion oscillation control in combustion systems using hydrocarbon fuels is provided by acoustically tuning a fuel-delivery line to a desired phase of the combustion oscillations for providing a pulse of a fuel-rich region at the oscillating flame front at each time when the oscillation produced pressure in the combustion chamber is in a low pressure phase. The additional heat release produced by burning such fuel- rich regions during low combustion chamber pressure effectively attenuates the combustion oscillations to a selected value.