公开(公告)号：US09885285B2

公开(公告)日：2018-02-06

申请号：US14857083

申请日：2015-09-17

Applicant: ROLLS-ROYCE PLC

Inventor： Christopher Alan Mosley ,  Angus Roy Smith ,  Christopher Thomas John Sheaf ,  John Richard Wells

IPC: F02C7/04 ,  F02K3/06

CPC classification number: F02C7/04 ,  F02K3/06 ,  F05D2250/232

Abstract: A nacelle for a turbofan gas turbine engine is provided. An inner wall of the nacelle defines an air intake which directs air into the fan section of the engine. The intake has, in flow series, an intake lip, a throat and a diffuser. The diffuser has, in flow series, first and second flow conditioning sections over both of which the flow cross-sectional area of the diffuser increases with increasing downstream distance from the throat. In addition, over the second section the nacelle inner wall lies substantially on a surface of an oblique circular cone having an apex which is offset from the centerline of the engine.