摘要:
A gas turbine engine includes an accessory gearbox (60) within an engine pylon (P). The accessory components (66) may be mounted within the engine pylon (P) to save weight and space within the core nacelle (12) as well as provide a relatively lower temperature operating environment.
摘要:
A control system (40) for a turbofan (10) comprises a variable area nozzle (26) for regulating core flow ( Fc ) through the turbofan, an actuator (27), a temperature sensor (42), a flight controller (44) and a nozzle control (47). The actuator (27) is coupled to the variable area nozzle (26) to regulate the core flow by positioning the variable area nozzle. The temperature sensor (42) is positioned in the turbofan to sense a gas path temperature of the core flow ( Fc ). The flight controller (44) is connected to the turbofan to make a thrust demand based on a flight condition of the turbofan (10). The nozzle control (47) is connected to the flight controller (44) and the actuator for directing the actuator based on the gas path temperature and the flight condition, such that the gas path temperature is controlled by adjusting the variable area nozzle (26) to regulate the core flow ( Fc ) while the turbofan meets the thrust demand.
摘要:
A nacelle assembly (26) includes an inlet lip section (38) and an airfoil (50) adjacent to the inlet lip section (38). The airfoil (50) is selectively moveable between a first position (X) and a second position (X') to adjust the flow of oncoming airflow and to influence an effective boundary layer thickness of the nacelle assembly (26).
摘要:
A turbine engine (10) provides a spool (14) supporting a turbine (18). The spool (14) is arranged in a core nacelle (12) and includes a thrust bearing (49). A fan (20) is arranged upstream from the core nacelle (12) and is coupled to the spool (14). A fan nacelle (34) surrounds the fan (20) and core nacelle (12) and provides a bypass flow path (39) that includes a fan nozzle exit area (40). A flow control device is adapted to effectively change the fan nozzle exit area (40). A controller (50) is programmed to monitor the thrust bearing (49) and command the flow control device in response to an undesired load on the thrust bearing (49). Effectively changing the fan nozzle exit area (40) with the flow control device actively manages the bearing thrust load to desired levels.
摘要:
A nacelle assembly (26) includes an inlet lip section (38) and an airfoil (50) adjacent to the inlet lip section (38). The airfoil (50) is selectively moveable between a first position (X) and a second position (X') to adjust the flow of oncoming airflow and to influence an effective boundary layer thickness of the nacelle assembly (26).
摘要:
A gas turbine engine (10) includes an accessory gearbox (60) within an engine pylon (P). The accessory components (66) may be mounted within the engine pylon (P) to save weight and space within the core nacelle (12) as well as provide a relatively lower temperature operating environment.