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Numerical analysis for LE-9 engine turbopumps

JAXA Supercomputer System Annual Report February 2023-January 2024

Report Number: R23EK2305

Subject Category: Space Technology

PDF available here

  • Responsible Representative: Masashi Okada, Project manager, H3 Project Team
  • Contact Information: Atsuhiro Tsunoda(tsunoda.atsuhiro@jaxa.jp)
  • Members: Mizuho Aotsuka, Ittetsu Inuzuka, Hideyo Negishi, Hideo Sunakawa, Wataru Sato, Atsuhiro Tsunoda, Satoshi Ukai

Abstract

Design evaluation using numerical simulation is carried out for technical issues of the LE-9 engine turbo pump.

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

Flutter analysis requires large-scale resources, and when a failure occurs, multiple cases must be performed in a short period of time and quickly reflected in the design by comparing them with the results of turbopump and engine firing tests.

Achievements of the Year

Large-scale and high fidelity flutter analyses at off-nominal conditions have been carried out. As a result, it is clarified the region which is necessary to be considered and contributed to build the design method to avoid flutter occurrence by comparing computed aerodynamic damping ratio, which indicates the margin for flutter, against actual test results.

Publications

N/A

Usage of JSS

Computational Information

  • Process Parallelization Methods: XPFortran
  • Thread Parallelization Methods: OpenMP
  • Number of Processes: 20 – 960
  • Elapsed Time per Case: 500 Hour(s)

JSS3 Resources Used

 

Fraction of Usage in Total Resources*1(%): 0.09

 

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 2402733.85 0.11
TOKI-ST 85.66 0.00
TOKI-GP 0.00 0.00
TOKI-XM 0.00 0.00
TOKI-LM 0.00 0.00
TOKI-TST 0.00 0.00
TOKI-TGP 0.00 0.00
TOKI-TLM 0.00 0.00

 

File System Resources
File System Name Storage Assigned
(GiB)
Fraction of Usage*2(%)
/home 6323.44 5.25
/data and /data2 133539.37 0.82
/ssd 32036.35 3.03

 

Archiver Resources
Archiver Name Storage Used
(TiB)
Fraction of Usage*2(%)
J-SPACE 16.94 0.06

*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)
0.00 0.00

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

JAXA Supercomputer System Annual Report February 2023-January 2024