Patent ID: 8650880

Claim:
An active combustion control device for mitigating combustion instability within a combustor of a turbine engine, the device comprising: a housing having an inlet and an outlet and an internal cavity defining a fuel flow path between the inlet and the outlet, the fuel flow path passing through at least one static flow port; a metering member extending along a valve axis and having a modulating end cooperating with the static flow port to effect modulated fuel flow at the outlet, wherein the modulating end defines an end face having at least one projection such that the end face varies with respect to the static flow port according to the rotational position of the metering member such that at a given axial position of the metering member the modulating end obstructs the fuel flow path differently when in a first rotational position than when in a second rotational position; a translation component for translating the metering member along the valve axis to control the amplitude of the modulated fuel flow; and a rotation component for rotating the metering member along the valve axis to control the frequency of the modulated fuel flow.