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Post-K Priority Issue 8D: Research and development of core technology to innovate aircraft design and operation

JAXA Supercomputer System Annual Report April 2018-March 2019

Report Number: R18ECMP06

Subject Category: Competitive Funding

PDF available here

  • Responsible Representative: Yuko Inatomi, Institute of Space and Astronautical Science, Department of Interdisciplinary Space Science
  • Contact Information: Ryoji Takaki(ryo@isas.jaxa.jp)
  • Members: Ryoji Takaki, Taku Nonomura, Seiji Tsutsumi, Yuma Fukushima, Soshi Kawai, Ikuo Miyoshi, Satoshi Sekimoto, Hiroshi Koizumi, Tomohide Inari, Ryota Hirashima, Yoshiharu Tamaki, Takuya Karatsu

Abstract

We develop a high-speed/high-precision computational program using a quasi-first principle method, which can faithfully reproduce the actual flight environment to understand the true nature of fluid phenomena. Specifically, we develop a high-precision compressible flow solver with geometric wall models and LES (Large Eddy Simulation) wall models based on hierarchical, orthogonal and equally spaced structured grids.

Reference URL

Please refer to 'サブ課題D|重点課題8:近未来型ものづくりを先導する革新的設計・製造プロセスの開発'.

Reasons for using JSS2

We need large computer like JSS2 because our calculations must be large scale computations. Moreover, JSS2 has a similar architecture to the our target computer called Post-K.

Achievements of the Year

We proceeded with the development of a compressible fluid analysis program FFVHC - ACE using a hierarchical, orthogonal and equally spaced structured grid method. In this fiscal year, a trial calculation for the aircraft of the actual detailed shape (JSM_CRM_LEG model) was performed using the immersed boundary method . Figure 1 is the computational grid for the JSM_CRM_LEG model. Figure 2 shows the object surface of the landing gear expressed in the flow solver. The reproducibility of the object surface is improved as the grid resolution improves. Figure 3 shows the vorticity around the JSM_CRM_LEG model, where Mach number is 0.2, the Reynolds number is 10 6 , and attack angle is 7 degrees. The total number of grid points is about 800 million, of which the number of fluid points is about 600 million.

Annual Reoprt Figures for 2018

Fig.1: The hierarchical, orthogonal and equally spaced structured grid around the JSM_CRM_LEG model.

 

Annual Reoprt Figures for 2018

Fig.2: Shape reproducibility of complicated geometry.

 

Fig.3(video): Flow around the JSM_CRM_LEG model.

Publications

- Oral Presentations

R. Takaki, Toward the achievement of the aerodynamic characteristic evaluation for real configurations and real flight environments of aircraft, 4rd Symposium on Post-K computer Priority Issue 8.

- Other

Ryoji Takaki, How to make an aerospace vehicle with supercomputer !? - Roles of supercomputer in manufacturing - , 13th symposium to know K-computer in Mito - From K-computer to Post-K computer.

Usage of JSS2

Computational Information

  • Process Parallelization Methods: MPI
  • Thread Parallelization Methods: OpenMP
  • Number of Processes: 256 - 600
  • Elapsed Time per Case: 120 Hour(s)

Resources Used

 

Fraction of Usage in Total Resources*1(%): 3.88

 

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 36,154,361.50 4.43
SORA-PP 6,470.46 0.05
SORA-LM 0.00 0.00
SORA-TPP 0.00 0.00

 

File System Resources
File System Name Storage Assigned
(GiB)
Fraction of Usage*2(%)
/home 2,181.51 2.26
/data 33,258.50 0.59
/ltmp 12,472.17 1.07

 

Archiver Resources
Archiver Name Storage Used
(TiB)
Fraction of Usage*2(%)
J-SPACE 36.60 1.28

*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


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News - Recent Posts

Language / 言語

"Annual Report" available

How to use JSS3

To use JSS3, please refer to "How to use JSS3" page .

Location

Chofu Aerospace Center
7-44-1 Jindaiji Higashi-machi, Chofu-shi, Tokyo