公开(公告)号：US20140157781A1

公开(公告)日：2014-06-12

申请号：US14090755

申请日：2013-11-26

Applicant: Rolls-Royce PLC

Inventor： Anthony John MORAN ,  Christopher Luke FORD ,  Jonathan Frederick CARROTTE ,  Alastair Duncan WALKER

IPC: F23R3/02

CPC classification number: F23D11/383 ,  F05D2250/14 ,  F05D2250/141 ,  F23D2900/11101 ,  F23D2900/11403 ,  F23R3/02 ,  F23R3/14 ,  F23R3/16 ,  F23R3/286 ,  F23R3/343

Abstract: A gas turbine engine lean burn fuel injector includes a fuel injector head which has a first air swirler, a second air swirler arranged around the first air swirler, a pilot fuel injector arranged radially between the first air swirler and the second air swirler. A third air swirler arranged around the second air swirler, a fourth air swirler arranged around the third air swirler and a main fuel injector arranged radially between the third air swirler and the fourth air swirler. A shroud is arranged around the fourth air swirler. A downstream end of the shroud is generally circular in cross-section in a plane perpendicular to the axis (Y) of the fuel injector head and an upstream end of the shroud is generally elliptical in cross-section in a plane perpendicular to the axis (Y) of the fuel injector head.

Abstract translation: 燃气涡轮发动机贫燃燃料喷射器包括燃料喷射器头，其具有第一空气旋流器，布置在第一空气旋流器周围的第二空气旋流器，在第一空气旋流器和第二空气旋流器之间径向布置的引燃燃料喷射器。 围绕第二空气旋流器布置的第三空气旋流器，围绕第三空气旋流器布置的第四空气旋流器和在第三空气旋流器和第四空气旋流器之间径向布置的主燃料喷射器。 围绕第四个空气旋流器布置一个护罩。 护罩的下游端在垂直于燃料喷射器头部的轴线（Y）的平面中具有大致圆形的横截面，并且护罩的上游端在垂直于轴线的平面中的横截面为大致椭圆形（ Y）。