Aerodynamic testing technology for reentering capsules
JAXA Supercomputer System Annual Report February 2021-January 2022
Report Number: R21EA1403
Subject Category: Aeronautical Technology
- Responsible Representative: Shigeru Hamamoto, Aviation Technology Directorate, Aeronautical Facility Research Unit
- Contact Information: Keisuke Fujii(keisuke@chofu.jaxa.jp)
- Members: Keisuke Fujii, Hiroya Toriida, Hidemi Takahashi, Yoshiki Takama, Takahiro Yamamoto
Abstract
To enhance hypersonic aerodynamic testing technology especially for reentering vehicles through developing understanding about the hypersonic wind tunnel nozzle flow which affects a lot estimation error to the flight characteristics and through defining the ability in predicting RCS jet interaction.
Reference URL
N/A
Reasons and benefits of using JAXA Supercomputer System
Since it perfectly suits the requirement in calculating heavy RCS jet interaction flow field and the hypersonic nozzle flow. Useful tools such as FaSTAR is another.
Achievements of the Year
Flow inside JAXA 1.27m hypersonic wind tunnel was solved numerically. The causes for the variation of dynamic pressure at the nozzle exit, which was observed in the experiments, were investigated numerically. Two factors were predicted as a candidate of the cause. One is the wall temperature upsream of the cooled nozzle throat block, as shown in Fig.1. The other is the inflow from the downstream of the settling chamber, as shown in Fig.2. The magnitude of the dynamic pressure variation was comparable between experiment and CFD.
Publications
N/A
Usage of JSS
Computational Information
- Process Parallelization Methods: MPI
- Thread Parallelization Methods: N/A
- Number of Processes: 48 – 144
- Elapsed Time per Case: 24 Hour(s)
JSS3 Resources Used
Fraction of Usage in Total Resources*1(%): 0.08
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 | 1799921.68 | 0.09 |
TOKI-ST | 10632.36 | 0.01 |
TOKI-GP | 0.00 | 0.00 |
TOKI-XM | 0.00 | 0.00 |
TOKI-LM | 18.72 | 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 | 137.91 | 0.14 |
/data and /data2 | 3589.32 | 0.04 |
/ssd | 128.33 | 0.03 |
Archiver Name | Storage Used(TiB) | Fraction of Usage*2(%) |
---|---|---|
J-SPACE | 5.82 | 0.04 |
*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) | 646.36 | 0.45 |
*2: Fraction of Usage:Percentage of usage relative to each resource used in one year.
JAXA Supercomputer System Annual Report February 2021-January 2022