FIRE EXTINCTION DESIGN FOR AN AUXILIARY POWER UNIT COMPARTMENT OF AN AIRCRAFT

摘要

The invention refers to an APU compartment, and a method for extinguishing a fire in an APU compartment. The APU compartment (1) comprises an APU (2), an exhaust (5), an aperture (7) providing a passage between the APU compartment (1) and the inside of the exhaust (5), and a fire detection system, wherein the APU compartment (1) of the invention is constructed as an air tight compartment, and additionally comprises a conduit (9) for providing external air to the APU compartment (1), a door (8) for closing the conduit (9) inlet, and a control unit (6) configured to close the door (8) when a fire is detected, such that when the door (8) is closed and the APU (2) is in operation, the air contained in the APU compartment (1) is sucked through the aperture (7) to be expelled out of the APU compartment (1) to extinguish the fire.

主权项

1. An auxiliary power unit compartment (1) of an aircraft, comprising:
an auxiliary power unit (2) placed in the auxiliary power unit compartment (1) and having a turbine (3); an intake duct (4) for providing external air to the turbine (3); an exhaust (5) for expelling combustion gases; an aperture (7) providing a passage between the auxiliary power unit compartment (1) and an inside of the exhaust (5), and a fire detection system for detecting a fire within the auxiliary power unit compartment (1), wherein the auxiliary power unit compartment (1) is constructed as an air tight compartment and includes a conduit (9) for providing external air to the space contained in the auxiliary power unit compartment (1) and outside of the auxiliary power unit (2), a door (8) for closing the conduit (9) inlet, and a control unit (6) being configured to close the door (8) when a fire is detected by the fire detection system, such that when the door (8) is closed and the auxiliary power unit (2) is in operation, the air contained in the auxiliary power unit compartment (1) is sucked through the aperture (7) to be expelled out of the auxiliary power unit compartment (1) to extinguish the fire.