公开(公告)号：US20190136713A1

公开(公告)日：2019-05-09

申请号：US16149179

申请日：2018-10-02

Applicant: ROLLS-ROYCE plc

Inventor： Zahid HUSSAIN

IPC: F01D25/12 ,  F01D9/00

Abstract: There is disclosed a cooling arrangement for a turbine casing (50) of a gas turbine engine (10). The cooling arrangement comprises a first cooling duct (203) that is at least partly within a second cooling duct (204). The first cooling duct is for a first cooling fluid flow and the second cooling duct is for a second cooling fluid flow which flows around the first cooling duct.

公开(公告)号：US20170114657A1

公开(公告)日：2017-04-27

申请号：US15276498

申请日：2016-09-26

Applicant: ROLLS-ROYCE plc

Inventor： Zahid HUSSAIN ,  Clare L. BEWICK ,  Richard PEACE

IPC: F01D17/10 ,  F16K31/52 ,  F16K1/22 ,  F02C6/08 ,  F02C9/18

CPC classification number: F01D17/105 ,  F01D17/148 ,  F02C6/08 ,  F02C9/18 ,  F02K3/075 ,  F04D27/0215 ,  F04D29/526 ,  F05D2220/32 ,  F05D2240/40 ,  F05D2270/101 ,  F16K1/223 ,  F16K31/521 ,  Y02T50/672

Abstract: A bleed valve arrangement for a gas turbine engine comprises a bleed valve housing defining a bleed duct through which a bleed flow may pass in use and a valve within the bleed duct operable between a closed position and an open position. The valve position is continuously variable between the closed position and the open position. The arrangement further comprises an ejection duct downstream of the bleed duct. The arrangement is characterised in that the ejection duct has a greater cross-sectional area than the bleed duct immediately downstream of the bleed duct so that the bleed flow experiences a sudden expansion on passing from the bleed duct into the ejection duct.