| 摘要 |
An exhaust nozzle assembly (18) includes an inner liner (22) exposed to hot combustion gases and an outer liner (28) spaced a radial distance from the inner liner (22) to form an annular chamber (25). The inner liner (22) includes a hot side (24) that is directly exposed to the hot combustion gas flow and a cold side (26) that is exposed to cooling air within the chamber (25). The outer liner (28) includes an outer surface (30) exposed to cooling air flow up to a restriction (44) preventing communication of cooling air flow. A plenum (38) is attached to the outer liner (28) to define a plenum chamber (40) that extends into an end portion (45). The plenum chamber (40) receives cooling air flow from a supply opening (43) and communicates that air to the end portion (45) through a plurality of impingement openings (42) that provide impingement flow of cooling air outboard of the restriction (44). |
