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Research of numerical prediction for the flight stability

JAXA Supercomputer System Annual Report February 2022-January 2023

Report Number: R22EDA201G26

Subject Category: Aeronautical Technology

PDF available here

  • Responsible Representative: Kazuyuki Nakakita, Aeronarutical Technology Directorate, Aircraft Life Cycle Innovation Hub
  • Contact Information: Yoimi Kojima(kojima.yoimi@jaxa.jp)
  • Members: Hirokazu Higashida, Atsushi Hashimoto, Yoimi Kojima, Hideji Saiki, Takahiro Yamamoto

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 is used as a turbulence model. The time-averaged surface streamlines in experimets and the simulations suggest that the current simulation well predict the characteristic phenomenon that appears in the roll instability.

Annual Reoprt Figures for 2022

Fig.1: Surface streamlines in experiments and numerical simulations

 

Publications

N/A

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(%): 0.57

 

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 15583474.19 0.68
TOKI-ST 4501.90 0.00
TOKI-GP 0.00 0.00
TOKI-XM 0.00 0.00
TOKI-LM 3384.22 0.23
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 63.19 0.06
/data and /data2 26853.15 0.21
/ssd 574.24 0.08

 

Archiver Resources
Archiver Name Storage Used
(TiB)
Fraction of Usage*2(%)
J-SPACE 34.00 0.15

*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)
62.56 0.04

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

JAXA Supercomputer System Annual Report February 2022-January 2023