Numerical Simulations for H3 Rocket Development
JAXA Supercomputer System Annual Report April 2020-March 2021
Report Number: R20EK2302
Subject Category: Space Technology
- Responsible Representative: Masashi Okada, Space Transporation Technology Directorate, H3 Project Team
- Contact Information: Hideyo Negishi(negishi.hideyo@jaxa.jp)
- Members: Kuniyuki Takekawa, Seiji Tsutsumi, Masashi Kanamori, Hironori Fujiwara, Masaharu Abe, Hiroyuki Ito, Shinji Ohno, Takenori Nakajima, Hideyo Negishi, Yu Daimon, Takanori Haga, Taro Shimizu, Junya Aono, Tetsufumi Ohmaru, Taroh Fukuda, Masashi Toyama, Osamu Fukasawa, Kohki Tao, Satoshi Ukai, Rika Yamada
Abstract
Please refer to the following URL: http://global.jaxa.jp/projects/rockets/h3/
Reference URL
N/A
Reasons and benefits of using JAXA Supercomputer System
Risk management is the key to make a success of a large-scale development project like H3 rocket. This is because its development schedule and cost could be significantly influenced by the face of imminent risks when new technologies are under system-level verification and validation. In order to complete the project under defined period and cost, a variety of efforts are essential for planning and process of technology development itself in terms of efficiency and certainty. In that context, numerical simulation technologies and JSS2 have been playing one of major roles to make the H3 project success.
Achievements of the Year
With regard to the booster engine, 'LE-9', under detailed design phase, evaluation of design and risks as well as studies for improvement were carried out by making full use of JSS2. In FY2020, numerical simulations of the combustion chamber and turbopump design were performed to improve their designs and contributed to the LE-9 engine development.
Publications
N/A
Usage of JSS
Computational Information
- Process Parallelization Methods: MPI
- Thread Parallelization Methods: FLAT
- Number of Processes: 128 - 16000
- Elapsed Time per Case: 300 Hour(s)
Resources Used(JSS2)
Fraction of Usage in Total Resources*1(%): 19.94
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 | 121,029,899.97 | 22.90 |
| SORA-PP | 26,087.25 | 0.20 |
| SORA-LM | 1,671.35 | 0.98 |
| SORA-TPP | 39,869.40 | 3.76 |
| File System Name | Storage Assigned(GiB) | Fraction of Usage*2(%) |
|---|---|---|
| /home | 10,114.56 | 9.27 |
| /data | 94,775.12 | 1.83 |
| /ltmp | 5,030.67 | 0.43 |
| Archiver Name | Storage Used(TiB) | Fraction of Usage*2(%) |
|---|---|---|
| J-SPACE | 137.54 | 4.55 |
*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(%): 5.59
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 | 29,499,285.00 | 6.35 |
| TOKI-RURI | 62,324.00 | 0.36 |
| TOKI-TRURI | 278,038.81 | 22.41 |
| File System Name | Storage Assigned(GiB) | Fraction of Usage*2(%) |
|---|---|---|
| /home | 16,536.22 | 11.33 |
| /data | 173,852.76 | 2.91 |
| /ssd | 2,897.57 | 1.51 |
| Archiver Name | Storage Used(TiB) | Fraction of Usage*2(%) |
|---|---|---|
| J-SPACE | 137.54 | 4.55 |
*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