公开(公告)号：US20210071672A1

公开(公告)日：2021-03-11

申请号：US17096581

申请日：2020-11-12

Applicant: ROLLS-ROYCE PLC

Inventor： Stephane M M BARALON ,  Mark J WILSON ,  Benedict R PHELPS

IPC: F04D15/00 ,  F02K1/38 ,  F02K3/075 ,  F04D27/02

Abstract: A gas turbine engine has an engine core and a bypass duct. A fan drives the flow through the bypass duct. A bypass efficiency is defined as the efficiency of the fan compression of the bypass flow. The bypass efficiency is a function of the bypass flow rate at a given set of conditions. The bypass flow rate at the optimum bypass efficiency is appreciably lower than the maximum bypass flow rate at the given conditions. This results in increased design flexibility and improved overall engine performance.

公开(公告)号：US20210222563A1

公开(公告)日：2021-07-22

申请号：US17064667

申请日：2020-10-07

Applicant: ROLLS-ROYCE plc

Inventor： Benjamin MOHANKUMAR ,  Mark J WILSON ,  Cesare A HALL

IPC: F01D5/14

Abstract: A gas turbine engine for an aircraft including: an engine core including a turbine, compressor, and core shaft connecting turbine to the compressor; a fan located upstream of engine core, the fan containing a plurality of fan blades mounted for rotation about an engine axis, each blade of the plurality of fan blades having a leading edge and trailing edge extending across a span of an airflow duct from blade root to tip; and a gearbox that receives an input from core shaft and outputs drive to fan so as to drive the fan at a lower rotational speed than the core shaft, wherein the trailing edge of each blade is characterized by a metric M defined as a rate of change of an angle of trailing edge between 0.4 and 0.8 of the span divided by an area averaged trailing edge angle, M being not less than around 4.

公开(公告)号：US20200011333A1

公开(公告)日：2020-01-09

申请号：US16398878

申请日：2019-04-30

Applicant: ROLLS-ROYCE plc

Inventor： Stephane M M BARALON ,  Mark J WILSON ,  Benedict R PHELPS

IPC: F04D15/00 ,  F02K3/075 ,  F02K1/38 ,  F04D27/02

Abstract: A gas turbine engine has an engine core and a bypass duct. A fan drives the flow through the bypass duct. A bypass efficiency is defined as the efficiency of the fan compression of the bypass flow. The bypass efficiency is a function of the bypass flow rate at a given set of conditions. The bypass flow rate at the optimum bypass efficiency is appreciably lower than the maximum bypass flow rate at the given conditions. This results in increased design flexibility and improved overall engine performance.

公开(公告)号：US20170328280A1

公开(公告)日：2017-11-16

申请号：US15494665

申请日：2017-04-24

Applicant: ROLLS-ROYCE plc

Inventor： Zahid M HUSSAIN ,  Christopher T J SHEAF ,  Mark J WILSON ,  David G MACMANUS

IPC: F02C7/141 ,  F28F3/02 ,  F28F27/02 ,  F28F13/12

CPC classification number: F02C7/141 ,  F02C7/185 ,  F02K3/115 ,  F05D2260/22141 ,  F28F3/02 ,  F28F13/12 ,  F28F27/02 ,  F28F2250/06 ,  Y02T50/671 ,  Y02T50/675

Abstract: A heat sink for location in a fluid flow, including a heat sink base and a plurality of heat dissipating elements, such as elongate fins, extending from the surface of the heat sink base. In certain arrangements the heat sink is provided with a diversion flow passageway for diverting a fraction of fluid flow away from the heat dissipating elements. In other arrangements there may be two arrays of elongate fins laterally offset. In yet a further arrangement the heat sink may be configured to promote the generation of at least one vortex.