AUXILIARY POWER SUPPLY METHOD THROUGH AN AUXILIARY POWER UNIT AND CORRESPONDING ARCHITECTURE

摘要

An auxiliary power supply architecture includes one APU and a fuel supply basic circuit with a common fuel storage tank, a primary circulation conduct and secondary conducts for injecting such fuel into the combustion chambers of the APU unit through appropriate injectors. Such architecture also includes another independent fuel supply circuit to supply the APU unit with an emergency tank, a specific primary conduct for emergency fuel circulation and secondary conducts for injecting emergency fuel into the combustion chambers through appropriate injectors.

主权项

1. An auxiliary power supply method for an aircraft, being equipped with main engines and power consumers, through an auxiliary power supply unit (APU), provided with a combustion chamber, said method comprising:
in a primary mode, supplying non propulsive power with said APU to consumers of the aircraft from a source of a common fuel being common to the engines of the aircraft and to the APU, performing a basic circulation of said common fuel up to the combustion chamber of the APU, in an emergency mode, providing emergency power to vital systems of the aircraft with said APU, and supplying the combustion chamber of the APU unit with emergency fuel from a specific source according to an independent circulation being separated, at least in one part connected with the specific source, from the basic circulation.