초록 ▼

A device is provided for increasing the power output of a gas turbine engine at the low ambient inlet temperatures which would otherwise produce a decrease in power. The device includes a conduit for bypassing a portion of the compressor discharge air around the combustor whereupon it is reintroduce

A device is provided for increasing the power output of a gas turbine engine at the low ambient inlet temperatures which would otherwise produce a decrease in power. The device includes a conduit for bypassing a portion of the compressor discharge air around the combustor whereupon it is reintroduced back into the engine downstream of the compressor-driving turbine and upstream of the power turbine, if any. A valve is provided to increase the bypass flow rate through the conduit at low ambient temperatures, the increasing bypass flow permitting the engine to operate at a higher fuel flow and cycle temperatures for the same compressor mass flow. The increased temperature with the same mass flow rate results in an increase in power.

대표청구항 ▼

In a gas turbine engine having a compressor for pressurizing a flow of air, a combustor in which compressed air is mixed with fuel and combusted, a turbine driven by the hot gases of combustion and drivingly connected to said compressor, and a separate power turbine said engine characterized by a pr

In a gas turbine engine having a compressor for pressurizing a flow of air, a combustor in which compressed air is mixed with fuel and combusted, a turbine driven by the hot gases of combustion and drivingly connected to said compressor, and a separate power turbine said engine characterized by a predetermined relationship of power output versus compressor inlet ambient temperature at maximum compressor flow, a device for modulating the engine power output at a low ambient temperature comprising means for bypassing a portion of the air discharged from the compressor around the combustor and for reintroducing the portion into the cycle between the compressor and power turbines, means for modulating the bypass flow rate, and a throttle for modulating fuel flow rate, the resulting power level thereby exceeding the predetermined relationship at the same low ambient temperature.