Power plants – Combustion products used as motive fluid – Different fluids
Patent
1989-12-22
1992-05-26
Casaregola, Louis J.
Power plants
Combustion products used as motive fluid
Different fluids
60 39823, F02C 7264, F02C 727
Patent
active
051156377
ABSTRACT:
In order to assist in starting a gas turbine engine (10), hot pressurized exhaust gases are supplied through relatively large hot gas supply tubes (22) for direct impingement on turbine blades (14) to drive a turbine rotor (12). The relatively large hot gas supply tubes (22) are located in immediate proximity to a flame zone (32) of a combustor (16). This proximate location of the relatively large hot gas supply tubes (22) facilitates diversion of a small amount of hot pressurized, exhaust gases to the flame zone (32) through a flow control orifice (28) for the purpose of initiating ignition in the combustor (16) wherein the BTU energy of the exhaust gases is transferred to the combustor (16) during the starting thereof. The relatively large hot gas supply tubes (22) ensure a high mass flow rate of hot pressurized exhaust gases with some being directed to the flame zone (32) in a manner minimizing heat loss which enhances ignition reliability. Through the utilization of the present invention electrically activated ignitors may be eliminated.
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Casaregola Louis J.
Sundstrand Corporation
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