AUXILIARY POWER UNIT INLET DOOR HAVING OPENINGS FORMED THEREIN

摘要

An inlet door system includes a duct, an inlet door, and a plurality of openings. The duct is configured to extend from the auxiliary power unit (APU) to an intake opening formed in an outer surface of an aircraft. The duct includes an inlet port, an outlet port, and a duct sidewall extending between the inlet port and the outlet port. The inlet door includes an inner surface, an outer surface, and an outer peripheral edge between the inner and outer surfaces. The door is rotationally coupled to the duct, and is configured to selectively rotate between a closed position and a plurality of open positions. The openings extend through the inlet door between the inner surface and outer surface, and each opening is disposed adjacent to the outer peripheral edge.

主权项

1. An inlet door system for providing air to at least an auxiliary power unit (APU) contained within an aircraft, the inlet door system comprising:
a duct configured to extend from the auxiliary power unit (APU) to an intake opening formed in an outer surface of the aircraft, the duct including an inlet port, an outlet port, and a duct sidewall extending between the inlet port and the outlet port, the duct sidewall defining an air flow passage between the inlet port and the outlet port; an inlet door including an inner surface, an outer surface, and an outer peripheral edge between the inner and outer surfaces, the door rotationally coupled to the duct, the door configured to selectively rotate between (i) a closed position, in which the door seals the air inlet port and prevents air flow into the inlet port, and (ii) a plurality of open positions, in which the door does not seal the air inlet and allows air flow into the inlet port; and a plurality of openings extending through the inlet door between the inner surface and outer surface, each opening disposed adjacent to the outer peripheral edge.