Research of numerical prediction for the flight stability
JAXA Supercomputer System Annual Report February 2023-January 2024
Report Number: R23EDA201G26
Subject Category: Aeronautical Technology
- Responsible Representative: Kazuyuki Nakakita, Aeronarutical Technology Directorate, Aircraft Life Cycle Innovation Hub
- Contact Information: Yoimi Kojima(kojima.yoimi@jaxa.jp)
- Members: Katsuhito Kozawa, Yoimi Kojima, Hideji Saiki
Abstract
The flight stability of aircraft is necessary to establish safe flight. We aim to improve the technology level of flight stability prediction through numerical simulation. The numerical method is validated and analyzed for developing better numerical tools.
Reference URL
N/A
Reasons and benefits of using JAXA Supercomputer System
Unsteady simulations required for the stability analysis demand large computational resources and produce much data. JSS allows us to simulate and analysis of numerical results.
Achievements of the Year
We conducted several unsteady numerical simulations with forced roll oscillation to analyze roll instability of a high-mobility aircraft. The Spalart-Allmaras model based delayed detached eddy simulation (DDES) method is used as a turbulence model. The visualization of unsteady flow over the main wing indicates that the interaction between the shock wave and separation is the source of the roll instability.
Fig.1(video): Shock (blue) and separation (red) interaction over the main wing
Publications
– Oral Presentations
1) Yoimi Kojima, Akiko Hidaka, Shinji Nagai, “Numerical Analysis of Roll Instability Phenomenon in Transonic Flow over a SDM,” 56th FDC/42nd ANSS, 2023. (In Japanese)
2) Yoimi Kojima, Akiko Hidaka, Shinji Nagai, “Numerical Analysis of Uncommanded Lateral-Directional Motions of SDM in Transonic Flow,” AIAA SciTech Forum 2024, 2024.
Usage of JSS
Computational Information
- Process Parallelization Methods: MPI
- Thread Parallelization Methods: N/A
- Number of Processes: 1152 – 3456
- Elapsed Time per Case: 300 Hour(s)
JSS3 Resources Used
Fraction of Usage in Total Resources*1(%): 1.56
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 | 42317253.84 | 1.91 |
TOKI-ST | 8845.67 | 0.01 |
TOKI-GP | 0.00 | 0.00 |
TOKI-XM | 80.08 | 0.04 |
TOKI-LM | 246.63 | 0.02 |
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 | 37.73 | 0.03 |
/data and /data2 | 34326.12 | 0.21 |
/ssd | 386.15 | 0.04 |
Archiver Name | Storage Used(TiB) | Fraction of Usage*2(%) |
---|---|---|
J-SPACE | 26.78 | 0.10 |
*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) | 25.59 | 0.01 |
*2: Fraction of Usage:Percentage of usage relative to each resource used in one year.
JAXA Supercomputer System Annual Report February 2023-January 2024