公开(公告)号：US20190170355A1

公开(公告)日：2019-06-06

申请号：US16188352

申请日：2018-11-13

Applicant: ROLLS-ROYCE plc

Inventor： Luca TENTORIO ,  Hua Wei HUANG ,  Carl MULDAL ,  Juan Carlos ROMAN CASADO

IPC: F23R3/14 ,  F23R3/28 ,  F23R3/34

Abstract: A lean burn fuel injector comprises a fuel feed arm and a fuel injector head. The fuel feed arm has a single pilot fuel supply passage and a single main fuel supply passage extending there-through. The fuel injector head has a coaxial arrangement of an inner pilot air-blast fuel injector and a coaxially arranged outer main air-blast fuel injector. The inner pilot air-blast fuel injector comprises a coaxial arrangement of a pilot inner air swirler passage and a pilot outer air swirler passage. The outer main air-blast fuel injector comprises a coaxial arrangement of a main inner air swirler passage and a main outer air swirler passage. The single main fuel supply passage is arranged to supply main fuel to the main inner air swirler passage. The single pilot fuel supply passage is arranged to supply pilot fuel onto the pre-filming surfaces in the pilot inner and outer air swirler passages.

公开(公告)号：US20200378603A1

公开(公告)日：2020-12-03

申请号：US16878927

申请日：2020-05-20

Applicant: ROLLS-ROYCE plc

Inventor： Luca TENTORIO ,  Juan Carlos ROMAN CASADO ,  Giacomo DI CHIARO ,  Jonathan KNAPTON ,  Filippo ZAMBON ,  Radu IRIMIA

IPC: F23R3/28 ,  B05B15/62 ,  B05B1/34

Abstract: A fuel spray nozzle arrangement for a combustor, the fuel spray nozzle arrangement comprising a fuel spray nozzle connected to a feed arm, wherein the feed arm comprises an aerofoil.

公开(公告)号：US20200025386A1

公开(公告)日：2020-01-23

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：US20190078784A1

公开(公告)日：2019-03-14

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

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.