公开(公告)号：US20160097286A1

公开(公告)日：2016-04-07

申请号：US14846284

申请日：2015-09-04

Applicant: ROLLS-ROYCE PLC

Inventor： Ian TIBBOTT ,  Peter Thomas IRELAND ,  Anthony John RAWLINSON ,  Irene CRESCI

IPC: F01D5/18 ,  F01D9/06

CPC classification number: F01D5/188 ,  F01D5/189 ,  F01D9/041 ,  F01D9/065 ,  F05D2240/126 ,  F05D2240/127 ,  F05D2260/201 ,  F05D2260/2212 ,  F05D2260/22141 ,  Y02T50/673 ,  Y02T50/676

Abstract: A gas turbine engine component, especially an aerofoil-sectioned nozzle guide vane (NGV), having at least one internal cooling chamber for passage of cooling air, the chamber including leading edge portion and one inlet portion via which cooling air may enter the chamber from feed source, wherein the component includes a partitioning element, e.g. curved or scoop-shaped partitioning plate or wall, provided in the chamber inlet portion and defining within the inlet portion a sub-chamber adjacent the leading edge portion, and wherein partitioning element is configured so the cooling air velocity in the sub-chamber is less than the cooling air velocity in the remainder of inlet portion. The reduced velocity of the cooling air in the sub-chamber adjacent the leading edge serves to increase pressure therein, thereby maintaining desired backflow pressure margin between the feed pressure of the cooling air delivered to the showerhead holes and the gas-path from the combustor.

Abstract translation: 一种燃气涡轮发动机部件，特别是翼型截面喷嘴引导叶片（NGV），其具有用于冷却空气通过的至少一个内部冷却室，所述内部冷却室包括前缘部分和一个入口部分，冷却空气可通过该入口部分从冷却空气进入室 进料源，其中所述组件包括分隔元件，例如 弯曲或铲形的分隔板或壁，设置在室入口部分中，并且在入口部分内限定与前缘部分相邻的子室，并且其中分隔元件被构造成使得子室中的冷却空气速度较小 比进口部分的剩余部分中的冷却风速快。 靠近前缘的副室中的冷却空气的减小的速度用于增加其中的压力，从而在输送到喷头孔的冷却空气的进料压力和来自燃烧器的气体路径之间保持期望的回流压力裕度。