公开(公告)号：US10392971B2

公开(公告)日：2019-08-27

申请号：US15361234

申请日：2016-11-25

Applicant: ROLLS-ROYCE, PLC

Inventor： Angus R Smith ,  Christopher T Sheaf ,  David G MacManus ,  Robert E Christie

IPC: F01D25/24 ,  F01D9/02 ,  B64D33/02 ,  F04D29/52 ,  F02C7/04 ,  F01D25/04 ,  F04D29/66

Abstract: A nacelle for a turbofan gas turbine engine, having in flow series an intake lip, a diffuser and a fan casing. The diffuser has, in flow series, a main section and a recessed section adjacent to the fan casing. A transition region, such as a step, slope or curve, is provided between the main section and the recessed section. In some arrangements the transition region may be configured to promote flow separation and the formation of a separation bubble in the recessed section.

公开(公告)号：US11519330B2

公开(公告)日：2022-12-06

申请号：US17231130

申请日：2021-04-15

Applicant: ROLLS-ROYCE plc

Inventor： Robert E Christie ,  David G MacManus ,  Christopher T J Sheaf

IPC: F02C7/045 ,  B64D33/02 ,  F02K3/06

Abstract: A nacelle for a gas turbine engine having a longitudinal centre line. The nacelle includes an air intake disposed at an upstream end of the nacelle. The air intake includes, in flow series, an intake lip, a throat and a diffuser. The nacelle further includes a protrusion extending radially inward from the air intake downstream of the intake lip. The protrusion extends circumferentially by a protrusion angle (θp) with respect to the longitudinal centre line of the gas turbine engine.

公开(公告)号：US11415048B2

公开(公告)日：2022-08-16

申请号：US17231421

申请日：2021-04-15

Applicant: ROLLS-ROYCE PLC

Inventor： Robert E Christie ,  David G MacManus ,  Christopher T J Sheaf

IPC: F02C7/04 ,  F02K3/068 ,  B64D33/02

Abstract: A nacelle for a gas turbine engine having a longitudinal centre line. The nacelle includes an air intake disposed at an upstream end of the nacelle. The air intake includes, in flow series, an intake lip, a throat and a diffuser. The diffuser further includes a diffuser angle (θdiff), indicating a degree of divergence of the diffuser relative to the longitudinal centre line. The diffuser angle (θdiff) is from about 0 degrees to about 12 degrees.