Cooperative Research: Research on Dynamic Stabiilty Analysis
JAXA Supercomputer System Annual Report February 2021-January 2022
Report Number: R21EA3210
Subject Category: Aeronautical Technology
- Responsible Representative: Atsushi Hashimoto, Aeronautical Technology Directorate, Numerical Simulation Research Unit
- Contact Information: Yoimi Kojima(kojima.yoimi@jaxa.jp)
- Members: Hitoshi Arizono, Atsushi Hashimoto, Takashi Ishida, Shigeo Matsumoto, Yoimi Kojima, Kanako Yasue, Ichiro Maeda, Minoru Yoshimoto
Abstract
The aircraft dynamic stability is an essential information for evaluating the flight stability and designing the aircraft maneuver control systems. But there are limitations for the textbook-based estimations and the wind tunnel tests and, therefore, the CFD-based stability analysis is expected to dissolve the limitations. Our objective in this research is to apply FaSTAR, a high-speed solver for compressible flow developed in JAXA, for predicting the dynamic derivatives to validate the accuracy of the code.
Reference URL
N/A
Reasons and benefits of using JAXA Supercomputer System
The prediction for the dynamic derivatives requires quite a bit of numerical simulations. The vast computational resources provided by JSS allow us to enhance the process and make it much faster than we do them on desktop computers.
Achievements of the Year
We conducted numercal computation with DES (Detached Edddy Simulation) method to simulate unsteady flow over a Standard Dynamics Model (SDM) and predicted the dynamic derivatives. The votex structure over the SDM model (figure 1) indicates that the unsteady flow over the main wing is simulated in the present simulation. We will be working to evaluate the capability of our numerical method by comparing the numerical and experimental results.
Fig.1: Pressure field and vortex structure over the SDM model
Publications
- Non peer-reviewed papers
Yoimi Kojima, Atsushi Hashimoto, Ichiro Maeda, "Dynamic stability analysis on a Standard Dynamics Model with URANS method", 59th Aircraft Symposium, Dec. 2021
- Oral Presentations
Yoimi Kojima, Atsushi Hashimoto, Ichiro Maeda, "Dynamic stability analysis on a Standard Dynamics Model with URANS method", 59th Aircraft Symposium, Dec. 2021
Usage of JSS
Computational Information
- Process Parallelization Methods: MPI
- Thread Parallelization Methods: N/A
- Number of Processes: 64 - 128
- Elapsed Time per Case: 144 Hour(s)
JSS3 Resources Used
Fraction of Usage in Total Resources*1(%): 0.02
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 | 556500.77 | 0.03 |
| TOKI-ST | 666.44 | 0.00 |
| TOKI-GP | 0.00 | 0.00 |
| TOKI-XM | 0.00 | 0.00 |
| TOKI-LM | 25.91 | 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 | 503.82 | 0.50 |
| /data and /data2 | 41208.95 | 0.44 |
| /ssd | 1241.57 | 0.32 |
| Archiver Name | Storage Used(TiB) | Fraction of Usage*2(%) |
|---|---|---|
| J-SPACE | 71.91 | 0.49 |
*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) | 0.01 | 0.00 |
*2: Fraction of Usage：Percentage of usage relative to each resource used in one year.
JAXA Supercomputer System Annual Report February 2021-January 2022