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Development of improved numerical tools for Certification by Analysis(CbA)

JAXA Supercomputer System Annual Report February 2023-January 2024

Report Number: R23EDA201G22

Subject Category: Aeronautical Technology

PDF available here

  • Responsible Representative: Kazuyuki Nakakita, Aviation Technology Directorate, Aircraft Lifecycle Innovation Hub
  • Contact Information: Andrea Sansica(sansica.andrea@jaxa.jp)
  • Members: Atsushi Hashimoto, Kenji Hayashi, Yuki Ide, Takashi Ishida, Masashi Kanamori, David Lusher, Tomoaki Matsuzaki, Yoimi Kojima, Yosuke Sugioka, Andrea Sansica, Kosuke Uchida, Takahiro Yamamoto, Markus Zauner

Abstract

High-accuracy simulations for stall and buffet are needed during the aircraft design. However, since the simulation cost is very high, we want to develop computation methodologies that aim at high-accuracy results with low computational cost. Hybrid RANS/LES methods (Embedded LES, ELES) have been implemented in FaSTAR and validated for different flow configurations.

Reference URL

N/A

Reasons and benefits of using JAXA Supercomputer System

For stall and buffet analysis, it is necessary to perform calculations on 3D complex geometries. Achieving high accuracy requires a large amount of computing power, so it is necessary to use a JAXA supercomputer.

Achievements of the Year

We applied ELES method to transonic flow over a full-aircraft geometry (named CRM) and low-speed flow over a three-element airfoil (named 30P35N) for assessing the capabilities of complex geometry simulations. The results indicate that the ELES method can conduct high-fidelity simulations for complex geometries at moderate computational cost.

Annual Reoprt Figures for 2023

Fig.1: Visualization of ELES result for the transonic flow over a full-aircraft

 

Publications

– Oral Presentations

1) Yoimi Kojima, Yoshiyasu Ichikawa, Shunsuke Koike, “Scale Resolving Simulation of Vortex Generator Flows over a Three-Elemental Airfoil Flap,” AIAA Aviation Forum 2023.

Usage of JSS

Computational Information

  • Process Parallelization Methods: MPI
  • Thread Parallelization Methods: N/A
  • Number of Processes: 576 – 9216
  • Elapsed Time per Case: 144 Hour(s)

JSS3 Resources Used

 

Fraction of Usage in Total Resources*1(%): 3.80

 

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 101433585.65 4.58
TOKI-ST 228237.63 0.25
TOKI-GP 8742.50 0.11
TOKI-XM 5914.04 3.24
TOKI-LM 43782.22 3.34
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 1553.74 1.29
/data and /data2 172187.67 1.06
/ssd 35010.60 3.31

 

Archiver Resources
Archiver Name Storage Used
(TiB)
Fraction of Usage*2(%)
J-SPACE 32.17 0.12

*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)
2077.79 0.94

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

JAXA Supercomputer System Annual Report February 2023-January 2024