METHOD FOR ISOLATING A COMBUSTIBLE FLUID TANK FROM A DOWNSTREAM PORTION OF A TURBOMACHINE SUPPLY SYSTEM IN CASE OF A FIRE, AND SUCH A SUPPLY SYSTEM

摘要

A supply system for supplying fluid to a turbomachine including a fluid tank, a downstream portion located downstream from the tank, and a cutoff valve located between the tank and the downstream portion. The cutoff valve is configured to be at least partially open when a rotational speed of a shaft of the turbomachine is higher than a first threshold and in the absence of a fire detected in the turbomachine. The cutoff valve is closed when the two following conditions are satisfied: the rotational speed of the shaft is higher than the first threshold, and the rotational speed of the shaft was lower than the first threshold when a fire was detected in the turbomachine during the flight.