公开(公告)号：US11041626B2

公开(公告)日：2021-06-22

申请号：US15457456

申请日：2017-03-13

Applicant: ROLLS-ROYCE plc

Inventor： Hua Wei Huang ,  Jochen Rupp ,  Michael Whiteman

IPC: F23R3/00 ,  F23R3/34 ,  F02C9/28 ,  F02C9/32 ,  F23N1/00 ,  F02C9/26 ,  F23R3/50

Abstract: A combustion chamber system has pilot and main fuel manifolds, and pilot and main fuel nozzles. Each pilot nozzle is connected to the pilot manifold. Each main nozzle is connected to the main manifold. A greater total amount of fuel is supplied to the pilot nozzles than to the main nozzles. A greater amount of fuel is supplied to pilot nozzles at, or in, a first region of the combustion chamber than to pilot fuel nozzles at, or in, a second region. A greater amount of fuel is supplied to the main nozzles at, or in, the first region than to the main nozzles at, or in, the second to improve combustion efficiency, weak extinction and relight of the combustion chamber in a first mode of operation. A greater total amount of fuel is supplied to the main nozzles than to the pilot nozzles in a second mode of operation.

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.

公开(公告)号：US11181272B2

公开(公告)日：2021-11-23

申请号：US16119496

申请日：2018-08-31

Applicant: ROLLS-ROYCE plc

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

IPC: F23R3/30 ,  F23R3/14 ,  F23D11/10 ,  F23D11/38 ,  F23R3/28

Abstract: A fuel spray nozzle, for atomising liquid fuel in gas, including: an gas passage; a liquid fuel passage; a swirler provided in the gas passage and including vanes such that, when gas passes through the gas passage, the swirler produces a jet flow of gas from between adjacent vanes and a turbulent flow of gas in the wake of each vane; a prefilming surface for receiving liquid fuel from the liquid fuel passage, and gas from the gas passage, wherein the prefilming surface includes areas that receive jet flow of gas from the gas passage, in use; wherein the fuel spray nozzle is configured to direct the liquid fuel passing through the liquid fuel passage to the areas on the prefilming surface that receive a jet flow of gas from the gas passage.