Patent ID: 9631515
Date: 2017-04-25
CPC Classifications: F01D,F05D,Y02T

Claim:
1. A gas turbine comprising: a turbine stator wheel, including a plurality of stator vanes and a ring segment-shaped vane root, the stator vanes being hollow and each including a vane interior which can be supplied with cooling air, a ring-shaped sealing element of an inter-stage seal arranged radially inwardly, relative to an engine axis, of the vane root, at least one outflow duct positioned in the vane root and connected to the vane interior to output the cooling air from the vane interior, an annular space formed between the vane root and the sealing element and extending substantially in an axial direction, the at least one outflow duct issuing the cooling air into the annular space and the annular space discharging the cooling air into an area of the inter-stage seal, a plurality of axially extending ribs positioned in the annular space and extending from the at least one outflow duct through an exit opening of the annular towards area of the inter-stage seal, the ribs spacing apart the sealing element from the vane root and limiting circumferential cooling air flow in the annular space.