Simulation of Fire Extinguishing Agent Transport and Dispersion in Aircraft Engine Nacelle

The flow and dispersion characteristics of the fire extinguishing agent in pipings concentration distribution nacelle are essential for optimizing aircraft system. In present work, we developed a three-dimensional CFD model to simulate transport piping nacelle. results show that length structure near nozzles affect concentration, pressure, rate, agent. smaller bend angle connection with main piping, less time it takes reach more mass rate is injected, which conducive rapidly. External ventilation blockage nacelle’s ribs other components impact mainly concentrated middle rear areas engine Agent tests were carried out simulated experimental result similar simulation result, verifies feasibility method. method can be used increase meet safety requirements by changing outside increasing filling amount agent, so as achieve optimization