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Numerical Simulations for H3 Rocket Development

JAXA Supercomputer System Annual Report February 2023-January 2024

Report Number: R23EK2302

Subject Category: Space Technology

PDF available here

  • Responsible Representative: Masashi Okada, Space Transporation Technology Directorate, H3 Project Team
  • Contact Information: Hideyo Negishi(negishi.hideyo@jaxa.jp)
  • Members: Junya Aono, Masaharu Abe, Hiroaki Amakawa, Yu Daimon, Taroh Fukuda, Hironori Fujiwara, Osamu Fukasawa, Takanori Haga, Shotaro Hamato, Hiroyuki Ito, Shingo Matsuyama, Hideyo Negishi, Takenori Nakajima, Shinji Ohno, Taro Shimizu, Ryotaro Sakai, Seiji Tsutsumi, Masashi Toyama, Satoshi Ukai, Keita Yamamoto, Rika Yamada

Abstract

Please refer to the following URL: http://global.jaxa.jp/projects/rockets/h3/

Reference URL

Please refer to ‘JAXA | H3 Launch Vehicle‘.

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 JSS3 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 JSS3. In FY2023, numerical simulations of the combustion chamber and turbopump design were performed to improve their designs and contributed to the LE-9 engine development. As a result, H3 launch vehicle test flight No.2 was successfully launched as of Feb. 17th, 2024.

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)

JSS3 Resources Used

 

Fraction of Usage in Total Resources*1(%): 10.92

 

Details

Please refer to System Configuration of JSS3 for the system configuration and major specifications of JSS3.

Computational Resources
System Name CPU Resources Used
(Core x Hours)
Fraction of Usage*2(%)
TOKI-SORA 292816165.23 13.22
TOKI-ST 236538.51 0.26
TOKI-GP 380.27 0.00
TOKI-XM 5048.35 2.77
TOKI-LM 35763.29 2.72
TOKI-TST 446510.34 7.32
TOKI-TGP 0.00 0.00
TOKI-TLM 10901.78 30.58

 

File System Resources
File System Name Storage Assigned
(GiB)
Fraction of Usage*2(%)
/home 2925.00 2.43
/data and /data2 477770.39 2.95
/ssd 4700.83 0.44

 

Archiver Resources
Archiver Name Storage Used
(TiB)
Fraction of Usage*2(%)
J-SPACE 200.69 0.72

*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.

 

ISV Software Licenses Used

ISV Software Licenses Resources
ISV Software Licenses Used
(Hours)
Fraction of Usage*2(%)
ISV Software Licenses
(Total)
12914.05 5.83

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

JAXA Supercomputer System Annual Report February 2023-January 2024