公开(公告)号：US20180195727A1

公开(公告)日：2018-07-12

申请号：US15862745

申请日：2018-01-05

Applicant: ROLLS-ROYCE plc

Inventor： Frederic Witham ,  Steven Ballantyne ,  Jonathan M. Gregory ,  Mike OJ Caruso

IPC: F23R3/28 ,  F23R3/38 ,  F23R3/34 ,  F23R3/20 ,  F23R3/14 ,  F02C7/22 ,  F23D11/38 ,  F23D11/10 ,  F02C9/28

CPC classification number: F23R3/286 ,  F02C7/222 ,  F02C9/28 ,  F23D11/107 ,  F23D11/38 ,  F23D11/383 ,  F23D2900/11101 ,  F23R3/14 ,  F23R3/20 ,  F23R3/28 ,  F23R3/343 ,  F23R3/38 ,  F23R2900/00004

Abstract: A fuel injector comprises an elongate fuel passage (38) having an elongate axis extending from an upstream inlet end to a downstream outlet end. One or more outlets (38a) at an end of the passage extend obliquely with respect to the elongate axis. The elongate fuel passage is defined by an inner skin (35a) of a double skinned pipe, the double skinned pipe defining a first annular cavity (39) between the inner skin (35a) and outer skin (35). The inner skin (35a) and the outer skin (35) meet adjacent the one or more outlets (38a) to close an end of the first annular cavity (39). A second annular cavity (40) is defined by an annular outer wall (40a) extending from downstream of the passage end to a position downstream of the one or more outlets (38a). The fuel passage outlets (38a) emerge at a radially outer surface of the annular outer wall (40a). The annular outer wall (40a) is convergent at a downstream end whereby to define an orifice (40b) centred nominally coincident with the elongate axis. The annular outer wall (40a) may form part of an annular air swirler arranged nominally concentrically on the elongate axis.

公开(公告)号：US10677467B2

公开(公告)日：2020-06-09

申请号：US15245035

申请日：2016-08-23

Applicant: ROLLS-ROYCE plc

Inventor： Frederic Witham ,  Pierre Hilt ,  Steven P. Jones ,  Jonathan M. Gregory ,  Timothy Minchin

IPC: F23R3/14 ,  F23R3/58 ,  F23R3/28 ,  F02C3/04

Abstract: An annular air swirler configured to receive a fuel injector in a central bore. The swirler has one or more annular channels, defined by radially facing channel walls and having an inlet for receiving compressed air and an axially distal outlet. The channel walls converge inwardly towards the outlet and swirl vanes extend between opposing faces of the walls. The swirler turns incoming air to create a vortex at the channel outlet. An annular cooling apparatus associated with the air swirler is arranged axially adjacently downstream of the channel outlet(s), and includes a skirt portion radially spaced from a converging portion of the outermost channel wall defining a converging portion of a bowed coolant channel. A radially outwardly extending wall connects with the outermost channel wall and, with a face of the skirt portion, defines a radially outwardly extending portion of the bowed coolant channel adapted for increased heat exchange.