公开(公告)号：US11131460B2

公开(公告)日：2021-09-28

申请号：US16276669

申请日：2019-02-15

Applicant: ROLLS-ROYCE plc

Inventor： Carl L. Muldal ,  Luca Tentorio ,  Hua Wei Huang ,  Juan Carlos Roman Casado

IPC: F23R3/34 ,  F02K9/50 ,  F23R3/14

Abstract: A lean burn fuel injector has a head which has a coaxial arrangement of an inner pilot air-blast fuel injector and an outer main air-blast fuel injector. The pilot fuel injector comprises coaxially arranged inner and outer air swirler passages. The main fuel injector comprises coaxially arranged inner and outer air swirler passages. A first splitter is arranged between the passages. The first splitter has a conical divergent downstream portion. A second splitter is arranged radially within and spaced from the first splitter. The second splitter has a conical convergent portion and a conical divergent downstream portion. The downstream end of the second splitter is upstream of the downstream end of the first splitter. A connecting member connects the downstream end of the second splitter and the downstream portion of the first splitter upstream of the downstream end of the first splitter to form a sharp edge.