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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

PDF available here

  • 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.

Annual Reoprt Figures for 2018

Fig.1: visualization of instantaneous flow field

 

Annual Reoprt Figures for 2018

Fig.2: data sampling location for PSD

 

Annual Reoprt Figures for 2018

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.

Computational Resources
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 Resources
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 Resources
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