| 摘要 |
A cooling system for a turbine exhaust assembly 10 comprises an annular case 20, 21, a flow-path ring 12 and a splash plate or baffle 32. The flow-path ring 12 is coaxially disposed within the annular case 20, 21, and the splash plate or baffle 32 extends axially between the annular case 20, 21 and the flow-path ring 12. A plurality of cooling fluid apertures 31 are formed in the annular case 20, 21 in order to provide cooling fluid flow onto the splash plate or baffle 32. A plurality of impingement holes 33 are formed in the splash plate or baffle 32 in order to provide impingement cooling flow onto the flow-path ring 12. The flow-path ring may be provided with film cooling apertures 41 along the aft portion and/or the full axial length thereof. A blocker door 28 may be provided outside of the annular case 20, 21, downstream of the apertures 31, to increase a relative pressure of the cooling fluid flow. The annular case 20, 21 may comprise an inner turbine exhaust case or an outer turbine case.
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