| 摘要 |
A ducted fan gas turbine assembly has a thrust reverser assembly having a vane arrangement including a first set of turning vanes (37) for channelling airflow from the duct in a rearward direction and a second set of turning vanes (38) for channelling airflow from the bypass duct (30) in a forward direction. The thrust reverser assembly further has a plurality of blocker doors (41) which are deployable to block the bypass duct (30). The nacelle has a stationary cowl portion (32) and a movable cowl portion (33) which is translatable rearwardly relative to the stationary cowl portion (32) to open an annular gap (43) therebetween. The cowl portions (32, 33) cooperate with the thrust reverser assembly to provide three operational configurations. In the first operational configuration the gap (43) between the cowl portions (32, 33) is closed and the vane arrangement is stowed in the nacelle to prevent airflow from the duct (30) flowing therethrough. In the second operational configuration the first set of turning vanes (37) is positioned in the gap (43) opened between the cowl portions (32, 33) to form an annular secondary discharge nozzle from the bypass duct (30) for the duct airflow. In the third operational configuration the blocker doors (41) are deployed and the second set of turning vanes (38) is positioned in the gap (43) opened between the cowl portions (32, 33) to divert the duct airflow through the second set of turning vanes (38) and provide reverse thrust. |
