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Cooperative Research: Research on Dynamic Stabiilty Analysis

JAXA Supercomputer System Annual Report February 2022-January 2023

Report Number: R22EA3210

Subject Category: Aeronautical Technology

PDF available here

  • Responsible Representative: Atsushi Hashimoto, Aeronautical Technology Directorate, Numerical Simulation Research Unit
  • Contact Information: Yoimi Kojima(kojima.yoimi@jaxa.jp)
  • Members: Atsushi Hashimoto, Takashi Ishida, Keiji Ueshima, Minoru Yoshimoto, Ichiro Maeda, Yoshihiro Tachibana, Takashi Aoyama, Kanako Yasue, Hitoshi Arizono, Yoimi Kojima

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, both for steady and unsteady states. 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 unsteady simulations over a Standard Dynamics Model (SDM) for predicting the dynamic derivatives. We employed Spalart-Allmaras based DDES (Deleyed Detached Eddy Simulation) method for simulating the turbulent flows over the model. We compared the derivatives with experimental results and confirmed that the simulation could provide accurate predictions for aircraft’s dynamic stability.

Fig.1(video): Flow visualization over the model

Publications

N/A

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(%): 0.01

 

Details

Please refer to System Configuration of JSS3 for the system configuration and major specifications of JSS3.

Computational Resources
System Name CPU Resources Used
(Core x Hours)
Fraction of Usage*2(%)
TOKI-SORA 336470.19 0.01
TOKI-ST 80.66 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 Resources
File System Name Storage Assigned
(GiB)
Fraction of Usage*2(%)
/home 433.07 0.39
/data and /data2 40896.42 0.32
/ssd 1405.56 0.19

 

Archiver Resources
Archiver Name Storage Used
(TiB)
Fraction of Usage*2(%)
J-SPACE 39.24 0.17

*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 Resources
ISV Software Licenses Used
(Hours)
Fraction of Usage*2(%)
ISV Software Licenses
(Total)
0.00 0.00

*2: Fraction of Usage:Percentage of usage relative to each resource used in one year.

JAXA Supercomputer System Annual Report February 2022-January 2023