Research of unsteady flow simulation toward prediction of full-flight envelope
JAXA Supercomputer System Annual Report April 2018-March 2019
Report Number: R18EDA201N01
Subject Category: Aeronautical Technology
- Responsible Representative: Takashi Aoyama, Aeronautical Technology Directorate, Numerical Simulation Research Unit
- Contact Information: Takashi Ishida(ishida.takashi@jaxa.jp)
- Members: Takashi Ishida, Atsushi Hashimoto, Kenji Hayashi, Takashi Aoyama, Takahiro Yamamoto, Masashi Kanamori, Keiichi Murakami, Hideaki Aiso, Keita Nakamoto, Andrea Sansica, Tomoaki Matsuzaki, Paul Zehner
Abstract
The research related to unsteady flow simulation of the aircraft buffet phenomenon is conducted aimed for the prediction of full-flight envelope.
Reference URL
N/A
Reasons for using JSS2
A huge amount of computational resources is needed to simulate the aircraft buffet phenomenon which is high-Reynolds number and complex flow including flow separation.
Achievements of the Year
LBM code for large scale unsteady flow simulation is now developping and the aerodynamic/aeroacoustic simulation of 30P30N, which is a high-lift device, was conducted for the validation. As a result, high-frequency peak from slat trailling edge and narrow band peaks (NBPs) are well captured by Cascaded LBM approach.
Fig.1: visualization of instantaneous flow field
Fig.2: data sampling location for PSD
Fig.3: PSD data comparison at port S10
Publications
N/A
Usage of JSS2
Computational Information
- Process Parallelization Methods: MPI
- Thread Parallelization Methods: OpenMP
- Number of Processes: 32 – 256
- Elapsed Time per Case: 100 Hour(s)
Resources Used
Fraction of Usage in Total Resources*1(%): 3.93
Details
Please refer to System Configuration of JSS2 for the system configuration and major specifications of JSS2.
| System Name | Amount of Core Time(core x hours) | Fraction of Usage*2(%) |
|---|---|---|
| SORA-MA | 36,045,506.81 | 4.41 |
| SORA-PP | 80,535.07 | 0.64 |
| SORA-LM | 15,170.53 | 7.07 |
| SORA-TPP | 0.00 | 0.00 |
| File System Name | Storage Assigned(GiB) | Fraction of Usage*2(%) |
|---|---|---|
| /home | 365.36 | 0.38 |
| /data | 31,804.31 | 0.56 |
| /ltmp | 7,632.64 | 0.65 |
| Archiver Name | Storage Used(TiB) | Fraction of Usage*2(%) |
|---|---|---|
| J-SPACE | 3.02 | 0.11 |
*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.
JAXA Supercomputer System Annual Report April 2018-March 2019