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High-Reynolds number stall characteristics of a wing-body configuration model

JAXA Supercomputer System Annual Report February 2023-January 2024

Report Number: R23EDA201G10

Subject Category: Aeronautical Technology

PDF available here

  • Responsible Representative: Kazuyuki Nakakita, Aviation Technology Directorate, Aircraft Lifecycle Innovation Hub
  • Contact Information: Kazuyuki Nakakita(nakakita.kazuyuki@jaxa.jp)
  • Members: Hiroya Toriida, Kuniyuki Takekawa, Takahiro Yamamoto

Abstract

Aerodynamic characteristics of a fundamental wing-body configuration model was analyzed by CFD to compare with High-Reynolds number wind tunnel data conducted in JAXA’s TWT2.

Reference URL

N/A

Reasons and benefits of using JAXA Supercomputer System

JSS3 was used to conduct AoA sweep CFDs of 3-dimansional model. Its abilitiers of parallel processing and many CFD cases wwere neccesary to conduct CFD in this research.

Achievements of the Year

We evaluated the effects of wall interference in wind tunnel tests using a fundamental wing-body model. It was confirmed that the stall angle decreases due to flow field interference with the wind tunnel side walls (walls in the span direction).

Annual Reoprt Figures for 2023

Fig.1: CL-AoA characteristics of fundamental wing-body model: Stall angle of attack had a difference of about 0.5 degrees whether there is a wind tunnel wall or not. The results with side walls were closer to the experimental results.

 

Publications

N/A

Usage of JSS

Computational Information

  • Process Parallelization Methods: MPI
  • Thread Parallelization Methods: N/A
  • Number of Processes: 960
  • Elapsed Time per Case: 2.5 Hour(s)

JSS3 Resources Used

 

Fraction of Usage in Total Resources*1(%): 0.08

 

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 2002617.69 0.09
TOKI-ST 33059.12 0.04
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 34.82 0.03
/data and /data2 105848.99 0.65
/ssd 295.30 0.03

 

Archiver Resources
Archiver Name Storage Used
(TiB)
Fraction of Usage*2(%)
J-SPACE 4.21 0.02

*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)
194.87 0.09

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

JAXA Supercomputer System Annual Report February 2023-January 2024