公开(公告)号：US11530651B2

公开(公告)日：2022-12-20

申请号：US17189650

申请日：2021-03-02

Applicant: ROLLS-ROYCE plc

Inventor： Christopher P. Madden ,  Peter Swann

IPC: F02C9/28 ,  F23R3/34 ,  F02C9/26 ,  F02C9/40 ,  F02C3/30

Abstract: A gas turbine engine for an aircraft. The gas turbine comprises a staged combustion system having pilot injectors and main injectors, a fuel metering system configured to control fuel flow to the pilot injectors and the main injectors, and a fuel system controller. The controller is configured to identify an atmospheric condition, determine a ratio of pilot fuel flow rate for the pilot injectors to main fuel flow rate for the main injectors in response to the atmospheric condition, and inject fuel by the pilot injectors and the main injectors in accordance with said ratio to control an index of soot emissions caused by combustion of fuel therein.

公开(公告)号：US08849541B2

公开(公告)日：2014-09-30

申请号：US13896793

申请日：2013-05-17

Applicant: Rolls-Royce PLC

Inventor： Peter Swann

IPC: G06F19/00 ,  E03B1/00 ,  G01N7/00 ,  F02C7/08 ,  F02C9/40 ,  F02C3/30 ,  G05D7/06

CPC classification number: G05D7/0617 ,  F02C3/30 ,  F02C9/40 ,  F05D2270/08 ,  F05D2270/081 ,  F05D2270/0831 ,  F05D2270/804 ,  Y02T50/671 ,  Y02T50/677 ,  Y02T50/678 ,  Y10T137/0324

Abstract: A method includes i) identifying a period of operation corresponding to a fuel supply requirement; ii) determining at least one ambient air condition in which the machine will operate during the period; iii) determining a duration of time in which, whilst in the ambient air condition, it is required to achieve a predetermined vapor trail characteristic; iv) determining a resultant fuel composition for use by the machine in the ambient air condition to achieve the characteristic, where the resultant fuel composition includes at least one of the first and second fuel compositions; v) determining the ratio of at least the first and second fuel compositions required for sufficient resultant fuel composition for the duration of time determined in step iii); and vi) producing a first signal indicative of the ratio of at least the first and second fuel compositions required for the duration of time determined in step iii).

Abstract translation: 一种方法包括：i）识别对应于燃料供应要求的操作周期; ii）确定在该期间机器将运行的至少一个环境空气状况; iii）确定持续时间，其中在环境空气条件下，需要实现预定的蒸气踪迹特征; iv）确定所述机器在环境空气条件下使用的所得燃料组合物以达到所述特性，其中所得燃料组合物包括所述第一和第二燃料组合物中的至少一种; v）确定在步骤iii）中确定的持续时间内足够的所得燃料组合物所需的至少第一和第二燃料组合物的比例; 和vi）产生指示在步骤iii）中确定的持续时间所需的至少第一和第二燃料组合物的比率的第一信号。