Aircraft engine starter integrated boundary bleed system
First Claim
1. An apparatus for supplying an aircraft with auxiliary compressed air and integral with an aircraft propulsive gas turbine engine having a rotor, said apparatus comprising:
- an auxiliary compressor for supplying the auxiliary compressed air,a means for mechanically driving said auxiliary compressor from the rotor of the gas turbine engine,a cycle varying means for operating the cycle of said auxiliary compressor independently from the cycle of the aircraft gas turbine engine,an air turbine on a common shaft with said auxiliary compressor,a means capable of supplying a portion of the auxiliary compressed air from said auxiliary compressor to said air turbine, anda means for supplying compressed starting air to said air turbine.
1 Assignment
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Accused Products
Abstract
An aircraft gas turbine engine is provided with a compressed air supply system generally used for meeting customer or aircraft bleed air requirements. The compressed air supply system comprises an auxiliary compressor, a means for mechanically driving the system from a rotor of the gas turbine rotor, and a cycle varying means, such as a variable speed drive, for operating the auxiliary compressor cycle independently of the aircraft gas turbine engine compressor cycle. The preferred embodiment provides a means for bleeding boundary layer air off the nacelle or another part of the aircraft outer skin and using it as a source of air for the auxiliary compressor. One embodiment includes an air turbine on a common shaft with the auxiliary compressor and a means to direct an unused portion of the airflow form the auxiliary compressor to the air turbine to help power the auxiliary compressor and another embodiment includes a means to direct compressed startling air to the air turbine for on ground and in flight starting of the gas turbine engine through the variable speed drive and a mechanical linkage to the high rotor of the gas turbine engine.
95 Citations
21 Claims
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1. An apparatus for supplying an aircraft with auxiliary compressed air and integral with an aircraft propulsive gas turbine engine having a rotor, said apparatus comprising:
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an auxiliary compressor for supplying the auxiliary compressed air, a means for mechanically driving said auxiliary compressor from the rotor of the gas turbine engine, a cycle varying means for operating the cycle of said auxiliary compressor independently from the cycle of the aircraft gas turbine engine, an air turbine on a common shaft with said auxiliary compressor, a means capable of supplying a portion of the auxiliary compressed air from said auxiliary compressor to said air turbine, and a means for supplying compressed starting air to said air turbine. - View Dependent Claims (2, 3, 4)
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5. An apparatus for bleeding boundary layer air and supplying aircraft auxiliary compressed air and integral with an aircraft propulsive gas turbine engine comprising:
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a bleed means for collecting boundary layer air from an aircraft'"'"'s outer skin, an auxiliary compressor, for supplying the auxiliary compressed air, in fluid supply communication with said bleed means effective for compressing bleed air supplied from said bleed means, a first ducting means to convey at least a portion of the compressed air from said auxiliary compressor to supply aircraft bleed air requirements, a transmission means connecting said compressor to the rotor of the gas turbine engine in a manner effective for driving said compressor off a rotor of the engine, an air turbine drivingly connected to said compressor, and a starting air supply means in switchable fluid supply communication with and effective for supplying compressed starting air to said air turbine. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification