| 摘要 |
A center plug 36 is configured for variable use in an exhaust nozzle 34. A forward portion of the plug 36 includes an inlet 56 having a closing flap 58 therein, and an aft portion of the plug includes an outlet 60. The flap 58 is selectively open during aircraft takeoff operation and up to a present climb altitude for bypassing a portion of core exhaust flow through the plug, with the flap being closed from preset altitude and cruise operation. Opening the flap 58 correspondingly increases the available flow area for discharging the exhaust flow for reducing velocity thereof, and attenuating noise.
|
