公开(公告)号：US20220237350A1

公开(公告)日：2022-07-28

申请号：US17581452

申请日：2022-01-21

Applicant: ROLLS-ROYCE plc

Inventor： Bryce D. CONDUIT ,  Jian Cheng WONG ,  Anthony B. PHIPPS ,  Piotr ZACHARZEWSKI ,  Chin Chun OOI ,  Qi QI ,  Yi WANG ,  My Ha DAO ,  Pao-Hsiung CHIU

IPC: G06F30/28 ,  G06F30/15

Abstract: A neural network is trained for, and may be used in, the simulation of the fluid flow through a domain around an object geometry. A first training process for the neural network includes training (902) the network on a first set of encodings of pre-computed computational fluid dynamics (CFD) simulations for object geometries and associated boundary conditions. The first training process uses a first loss function that evaluates an error between the network output and the pre-computed CFD simulations. A second training process is then carried out which includes training (905) the network on a second set of encodings of object geometries and associated boundary conditions. The second training process uses a second loss function that evaluates an error between the network output and a set of fluid dynamics conditions.

公开(公告)号：US20160377504A1

公开(公告)日：2016-12-29

申请号：US15172637

申请日：2016-06-03

Applicant: ROLLS-ROYCE plc

Inventor： Yiping KE ,  Jian Cheng WONG ,  Chi-Keong GOH ,  Kee Khoon LEE

IPC: G01M10/00

CPC classification number: G01M10/00 ,  G06F17/5009

Abstract: A vortex detection method is described. The method comprises storing a plurality of points at locations over a region (32) in which vortex detection is to be performed. A value for each of a plurality of fluid flow parameters, such as velocity, pressure and density, is determined at each point. The points are grouped as being contained in either a vortical flow portion or non-vortical flow portion of the region according to one or more statistical distribution for said fluid flow parameters. A point (p) in a vortex core is identified according to the direction of motion of an array of further points (46) relative to said point in the vortex core. The further points (46) may surround the vortex core point.

Abstract translation: 描述了涡流检测方法。 该方法包括将多个点存储在要执行涡流检测的区域（32）上的位置处。 在每个点处确定多个流体流动参数中的每一个的值，例如速度，压力和密度。 根据所述流体流动参数的一个或多个统计分布，点被分组为包含在该区域的涡旋流部分或非涡旋流动部分中。 涡流芯中的点（p）根据涡流芯中的所述点的另外的点（46）的阵列的运动方向被识别。 另外的点（46）可围绕涡流心点。

公开(公告)号：US20160377462A1

公开(公告)日：2016-12-29

申请号：US15172820

申请日：2016-06-03

Applicant: ROLLS-ROYCE plc

Inventor： Yiping KE ,  Jian Cheng WONG ,  Chi-Keong GOH ,  Kee Khoon LEE

IPC: G01F1/32

CPC classification number: G01F1/3209 ,  G06F17/5009

Abstract: A flow feature detection method is described. The method includes storing a plurality of points at locations over a region in which vortex detection is to be performed. A value for each of a plurality of fluid flow parameters, such as velocity, pressure and density, is determined at each point. The points are grouped as being contained in either a flow feature portion or normal flow portion of the region according to one or more statistical distribution for the fluid flow parameters. A point is identified as being indicative of the flow feature by identifying multiple further points at least partially surrounding the point, and determining a plane in which the flow feature is identifiable based upon the relative values of the one or more fluid flow parameter for the further points. The method may be used to detect vortices and to identify a two-dimensional plane representative of a vortex.

Abstract translation: 描述流特征检测方法。 该方法包括在要执行涡流检测的区域上的位置处存储多个点。 在每个点处确定多个流体流动参数中的每一个的值，例如速度，压力和密度。 根据流体流动参数的一个或多个统计分布，点被分组为包含在区域的流动特征部分或正常流动部分中。 通过识别至少部分地围绕该点的多个另外的点，并且基于用于另外的一个或多个流体流动参数的相对值来确定流动特征可识别的平面，将点识别为指示流动特征 积分 该方法可用于检测涡流并识别代表涡流的二维平面。