本文へ移動

サイトナビゲーションへ移動

検索ボックスへ移動

サイドバーへ移動

ここは、本文エリアの先頭です。

Advanced simulation of internal flow in rotating machinery

JAXA Supercomputer System Annual Report April 2019-March 2020

Report Number: R19EA2111

Subject Category: Aeronautical Technology

PDF available here

  • Responsible Representative: Tatsuya Ishii, Aeronautical Technology Directorate, Propulsion Research Unit
  • Contact Information: Junichi Kazawa, Aeronautical Technology Directorate, Propulsion Research Unit(kazawa.junichi@jaxa.jp)
  • Members: Junichi Kazawa, Takahiro Kawahara

Abstract

Implement LES and DES in the rotating coordinate system to improve the aerodynamic performance prediction accuracy of rotating machine like fan, compressor, and so on, flows by numerical simulation.

Reference URL

N/A

Reasons and benefits of using JAXA Supercomputer System

LES and DES for rotating machines have a huge number of grid points and a high computational load. For this reason, calculations cannot be performed without JSS2.

Achievements of the Year

DES analysis was performed on the centrifugal compressor. It was confirmed that fine vortices can be captured by using a scheme with weak numerical viscosity.

Annual Reoprt Figures for 2019

Fig.1: Centrifugal compressor internal flow (entropy distribution)

 

Publications

N/A

Usage of JSS2

Computational Information

  • Process Parallelization Methods: MPI
  • Thread Parallelization Methods: Automatic Parallelization
  • Number of Processes: 64 – 106
  • Elapsed Time per Case: 100 Hour(s)

Resources Used

 

Fraction of Usage in Total Resources*1(%): 0.03

 

Details

Please refer to System Configuration of JSS2 for the system configuration and major specifications of JSS2.

Computational Resources
System Name Amount of Core Time
(core x hours)
Fraction of Usage*2(%)
SORA-MA 0.00 0.00
SORA-PP 85,292.20 0.55
SORA-LM 0.00 0.00
SORA-TPP 0.00 0.00

 

File System Resources
File System Name Storage Assigned
(GiB)
Fraction of Usage*2(%)
/home 10.04 0.01
/data 958.69 0.02
/ltmp 2,055.92 0.17

 

Archiver Resources
Archiver Name Storage Used
(TiB)
Fraction of Usage*2(%)
J-SPACE 0.00 0.00

*1: Fraction of Usage in Total Resources: Weighted average of three resource types (Computing, File System, and Archiver).

*2: Fraction of Usage:Percentage of usage relative to each resource used in one year.

JAXA Supercomputer System Annual Report April 2019-March 2020