公开(公告)号：US20160108811A1

公开(公告)日：2016-04-21

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 centreline of the engine.

Abstract translation: 提供了一种涡轮风扇燃气涡轮发动机的机舱。 机舱的内壁限定了将空气引导到发动机的风扇部分中的进气口。 进气口具有进气口，喉部和扩散器。 扩散器具有流动系列中的第一和第二流量调节部分，两者之间的扩散器的流动横截面积随着与喉部的下游距离的增加而增加。 此外，在第二部分上，机舱内壁基本上位于具有偏离发动机中心线的顶点的倾斜圆锥的表面上。