Analysis Technology for Spacecraft Aerodynamic Characteristics
JAXA Supercomputer System Annual Report February 2022-January 2023
Report Number: R22ETET44
Subject Category: Skills Acquisition System
- 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.

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.
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 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 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 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