A bleed valve system (10) includes a bleed valve (14), a valve regulator (18), a valve actuator (16) and a reverse flow relief valve (12). The bleed valve (14) is opened and closed to control a flow of bleed air from an upstream inlet (22) to a downstream ...

A valve system (30) intermediate a secondary flow path and a primary flow path selectively communicates secondary airflow into the primary gas flow path and controls airflow injected from a higher pressure plenum into a lower pressure flowpath. The system ...

A vent system (40) is disclosed having a first flow stream (1) flowing over a first surface (41) in a flow path (4), a conduit (44) that channels a second flow stream (2) into the flow path (4) and an aero-chimney (50) that is in flow communication with th...

The present invention relates to control of engine variable of a gas turbine engine to regulate the surge margins of at least two compressors. A controller (20) receives data measured from engine sensors (22, 23) and uses said data to determine an indicati...

A catalytic gas turbine includes a compressor, a catalytic combustor, a turbine, and a flow path conducting a bypass portion of the compressed air around the combustor and turbine. A method of operating the catalytic gas turbine to activate a catalyst in t...

The combustion vibration estimating apparatus (10) comprises an inputting unit (4) for inputting limiting values of plant (30) data, weather data and internal pressure variation, an internal pressure variation characteristic grasping unit (1) for making in...