Humidity compensation for combustion control in a gas turbine engine
A gas turbine engine ( 12 ) wherein combustion conditions are controlled as a function of the humidity of the ambient air ( 36 ) in order to ensure stable, emission-compliant performance over a range of ambient conditions. The pilot fuel fraction supplied to a dual mode combustor ( 10 ) may be contr...
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| Sprache: | eng |
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| Zusammenfassung: | A gas turbine engine (
12
) wherein combustion conditions are controlled as a function of the humidity of the ambient air (
36
) in order to ensure stable, emission-compliant performance over a range of ambient conditions. The pilot fuel fraction supplied to a dual mode combustor (
10
) may be controlled to be responsive to the relative humidity or the specific humidity of the ambient air. Humidity may be measured directly or it may be calculated as a function of other temperature and pressure measurements. A fuel system (
44
) is controlled by a controller (
46
) having as inputs the signals from one or more of a relative humidity sensor (
62
), a barometric pressure sensor (
56
), a wet bulb temperature sensor (
58
) and a dry bulb temperature sensor (
60
). |
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