公开(公告)号：US09068472B2

公开(公告)日：2015-06-30

申请号：US13368718

申请日：2012-02-08

申请人： Anthony J. Rawlinson ,  Peter Ireland ,  Lynne H. Turner ,  Ian Tibbott

发明人： Anthony J. Rawlinson ,  Peter Ireland ,  Lynne H. Turner ,  Ian Tibbott

IPC分类号： F01D5/18 ,  F01D9/06 ,  F01D11/08 ,  F01D25/12 ,  F01D11/12

CPC分类号： F01D25/12 ,  F01D5/186 ,  F01D5/187 ,  F01D9/06 ,  F01D11/08 ,  F01D11/122 ,  F05D2240/11 ,  F05D2240/81 ,  F05D2260/20 ,  F05D2260/202

摘要： A component of a turbine stage of a gas turbine engine is provided, the component forming an endwall for the working gas annulus of the stage. The component has one or more internal plena behind the endwall which, in use, contain a flow of cooling air. The component further has a plurality of exhaust holes in the endwall. The holes connect the plena to a gas-washed surface of the endwall such that the cooling air effuses through the holes to form a cooling film over the gas-washed surface. Each exhaust hole has a flow cross-sectional area which is greater at an intermediate position between the entrance of the hole from the respective plenum and the exit of the hole to the gas-washed surface than it is at said exit.

摘要翻译： 提供了一种燃气涡轮发动机的涡轮级的部件，该部件形成了用于工作台的工作气体环的端壁。 该组件在端壁后面具有一个或多个内部斑点，其在使用中包含冷却空气流。 该部件还在端壁中具有多个排气孔。 这些孔将绦虫连接到端壁的气体洗涤表面，使得冷却空气通过孔流出，以在气洗表面上形成冷却膜。 每个排气孔的流动横截面面积在从相应的压力室的孔的入口与孔的出口到气体洗涤表面之间的中间位置处比在所述出口处更大。