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Analysis Technology for Spacecraft Aerodynamic Characteristics

JAXA Supercomputer System Annual Report February 2022-January 2023

Report Number: R22ETET44

Subject Category: Skills Acquisition System

PDF available here

  • Responsible Representative: Yuko Inatomi, Institute of Space and Astronautical Science, Department of Interdisciplinary Space Science
  • Contact Information: takaki.ryoji@jaxa.jp(takaki.ryoji@jaxa.jp)
  • Members: Yuriko Shiratsuchi

Abstract

Research and development of analysis technology related to spacecraft aerodynamic design

Reference URL

N/A

Reasons and benefits of using JAXA Supercomputer System

Large-scale and large amount of analysis are possible if necessary.

Achievements of the Year

Mars Ascent Vehicle used in Mars Sample Return mission will be launched from the Mars environment with low Reynolds number and high Mach number, which are not found in the Earth environment. I calculated with Computational Fluid Dynamics to clarify how the difference in Reynolds number and Mach number affects the aerodynamic performance of the rocket flying to Mars. For each Mach number=0.5,1.0,1.5, no difference was found in the generation of shock waves due to the Reynolds number. On the other hand, it was found that the area of generating shock waves on the surface of the object was more wider in the Mars environment compared with the Earth environment.

Annual Reoprt Figures for 2022

Fig.1: The surface axial force coefficient distribution and the pressure distribution at AoA=5 deg., Ma=0.95, and Re=300,000

 

Publications

N/A

Usage of JSS

Computational Information

  • Process Parallelization Methods: MPI
  • Thread Parallelization Methods: Automatic Parallelization
  • Number of Processes: 1 – 48
  • Elapsed Time per Case: 3 Hour(s)

JSS3 Resources Used

 

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.

Computational Resources
System Name CPU Resources Used
(Core x Hours)
Fraction of Usage*2(%)
TOKI-SORA 2021.49 0.00
TOKI-ST 2146.30 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 10.00 0.01
/data and /data2 30720.00 0.24
/ssd 100.00 0.01

 

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.

 

ISV Software Licenses Used

ISV Software Licenses Resources
ISV Software Licenses Used
(Hours)
Fraction of Usage*2(%)
ISV Software Licenses
(Total)
86.40 0.06

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

JAXA Supercomputer System Annual Report February 2022-January 2023