Advanced simulation of internal flow in rotating machinery
JAXA Supercomputer System Annual Report April 2020-March 2021
Report Number: R20EA2111
Subject Category: Aeronautical Technology
- 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
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.
Fig.1: Centrifugal compressor internal flow (entropy distribution)
Publications
N/A
Usage of JSS
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(JSS2)
Fraction of Usage in Total Resources*1(%): 0.02
Details
Please refer to System Configuration of JSS2 for the system configuration and major specifications of JSS2.
| System Name | Amount of Core Time(core x hours) | Fraction of Usage*2(%) |
|---|---|---|
| SORA-MA | 0.00 | 0.00 |
| SORA-PP | 36,979.34 | 0.29 |
| SORA-LM | 0.00 | 0.00 |
| SORA-TPP | 0.00 | 0.00 |
| File System Name | Storage Assigned(GiB) | Fraction of Usage*2(%) |
|---|---|---|
| /home | 9.99 | 0.01 |
| /data | 958.22 | 0.02 |
| /ltmp | 2,046.13 | 0.17 |
| 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.
Resources Used(JSS3)
Fraction of Usage in Total Resources*1(%): 0.00
Details
Please refer to System Configuration of JSS3 for the system configuration and major specifications of JSS3.
| System Name | Amount of Core Time(core x hours) | Fraction of Usage*2(%) |
|---|---|---|
| TOKI-SORA | 0.00 | 0.00 |
| TOKI-RURI | 0.00 | 0.00 |
| TOKI-TRURI | 0.00 | 0.00 |
| File System Name | Storage Assigned(GiB) | Fraction of Usage*2(%) |
|---|---|---|
| /home | 0.56 | 0.00 |
| /data | 5.61 | 0.00 |
| /ssd | 5.61 | 0.00 |
| 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 2020-March 2021