Design and Verification of Engine Fire Extinguishing Nozzle for Civil Aircraft

In this paper, the theoretical design method of engine fire extinguishing nozzle is proposed, the flow distribution law of fire extinguishing agent in fan compartment and core compartment is explored, the fire extinguishing agent concentration test and verification of different configurations of fire extinguishing nozzles are carried out, and the influencing factors of fire extinguishing nozzle design that have great influence on the test results are found, which provides an important reference for the subsequent design and verification of civil aircraft fire extinguishing system.