초록 ▼

A control system and method for controlling the split between premix fuel flow and pilot fuel flow to a combustor in a gas turbine engine so that an acceptable emissions are maintained. Engine speed and exhaust gas temperature are used to obtain a combustor pilot zone temperature that will result in

A control system and method for controlling the split between premix fuel flow and pilot fuel flow to a combustor in a gas turbine engine so that an acceptable emissions are maintained. Engine speed and exhaust gas temperature are used to obtain a combustor pilot zone temperature that will result in the desired level of emissions. From this pilot zone temperature a desired split between premix fuel flow and pilot fuel flow is obtained and compared to the actual split to generate an error signal. The actual premix fuel flow and pilot fuel flow are then adjusted until the desired split and hence the desired emission levels are obtained.

대표청구항 ▼

1. A method for controlling the split between premix fuel flow and pilot fuel flow to a combustor in a gas turbine engine comprising the steps of:a) sensing an operating condition of said engine and generating a first signal thereof; b) generating a second signal indicative of a desired pilot zone t

1. A method for controlling the split between premix fuel flow and pilot fuel flow to a combustor in a gas turbine engine comprising the steps of:a) sensing an operating condition of said engine and generating a first signal thereof; b) generating a second signal indicative of a desired pilot zone temperature (Tpz) in said combustor from said first signal; c) generating a third signal indicative of a desired split between said premix fuel flow and said pilot fuel flow from said second signal; d) sensing at least one parameter from which one of either the actual premix fuel flow or actual pilot fuel flow can be determined, and generating a fourth signal indicative of said one of actual premix fuel flow or said actual pilot fuel flow; e) comparing said fourth signal to said third signal and generating an error signal therefrom; and f) adjusting the actual premix fuel flow and the actual pilot fuel flow to said combustor until said desired split is substantially reached.