Overview
The function of the exhaust section is to mix the core air with the bypass air to decrease noise. It gives a smooth gas flow through the thrust reverser assembly and final nozzle. The function of the thrust reverser is an aid to slow the aircraft down on landing.
The bypass air and core gases go through lobes on the collector/nozzle which causes them to mix. When the hot core gases are mixed with the bypass air, it causes a decrease in the gas flow velocity. The result of this decrease in the gas flow velocity is a decrease in noise. The gas flow goes through the thrust reverser assembly and final nozzle to give thrust. When the thrust reverser is in operation, two doors that pivot change the gas flow to a forward direction. This causes a brake forces to decelerate the aircraft during landing or during a rejected takeoff. The assembly forms the rear part of the nacelle between the cowl doors and the exhaust nozzle.
