公开(公告)号：US20210190010A1

公开(公告)日：2021-06-24

申请号：US17193317

申请日：2021-03-05

Applicant: ROLLS-ROYCE PLC

Inventor： Alastair D MOORE ,  Robert J TELLING

IPC: F02K3/06 ,  F02C7/24

Abstract: A gas turbine engine generates noise during use, and one particularly important flight condition for noise generation is take-off. A gas turbine engine that has high efficiency provides low noise, in particular from the fan and the turbine that drives the fan. Values are defined for a noise parameter NP that results in a gas turbine engine having reduced combined fan and turbine noise.

公开(公告)号：US20210190011A1

公开(公告)日：2021-06-24

申请号：US17193323

申请日：2021-03-05

Applicant: ROLLS-ROYCE plc

Inventor： Alastair D MOORE ,  Robert J TELLING

IPC: F02K3/06 ,  F02C7/24

Abstract: A gas turbine engine generates noise during use, and one particularly important flight condition for noise generation is take-off. A gas turbine engine that has high efficiency provides low noise, in particular from the fan and the turbine that drives the fan. Values are defined for a noise parameter NP that results in a gas turbine engine having reduced combined fan and turbine noise.

公开(公告)号：US20200263635A1

公开(公告)日：2020-08-20

申请号：US16683759

申请日：2019-11-14

Applicant: ROLLS-ROYCE plc

Inventor： Craig W BEMMENT ,  Alastair D MOORE ,  Robert J TELLING

IPC: F02K3/06 ,  F02C7/36

Abstract: A gas turbine engine generates noise during use, and one particularly important flight condition for noise generation is take-off. A gas turbine engine has high efficiency together with low noise, in particular from the fan. The fan tip relative Mach Number at take-off at a take-off lateral reference point, defined as the point on a line parallel to and 450 m from the runway centre line where the EPNL is a maximum during take-off, is below 1.09. This results in low fan noise, along with optionally enabling a reduction in noise attenuation material.

公开(公告)号：US20230109777A1

公开(公告)日：2023-04-13

申请号：US18070660

申请日：2022-11-29

Applicant: ROLLS-ROYCE PLC

Inventor： Alastair D MOORE ,  Robert J TELLING

IPC: F02K3/06 ,  F02C7/24

Abstract: A gas turbine engine generates noise during use, and one particularly important flight condition for noise generation is take-off. A gas turbine engine that has high efficiency provides low noise, in particular from the fan and the turbine that drives the fan. Values are defined for a noise parameter NP that results in a gas turbine engine having reduced combined fan and turbine noise.