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Basic research for system integration of silent supersonic airplane technologies

JAXA Supercomputer System Annual Report April 2019-March 2020

Report Number: R19ETET01

Subject Category: Skills Acquisition System

PDF available here

  • Responsible Representative: Yoshikazu Makino, Aeronautical Technology Directorate, Aviation Systems Research Unit
  • Contact Information: Hiroaki Ishikawa(ishikawa.hiroaki2@jaxa.jp)
  • Members: Yoshikazu Makino, Hiroaki Ishikawa, Ryo Shimada, Masahiro Doi, Toshiya Yokoi, Shota Yamamoto

Abstract

The system integration design technologies for achieving low sonic-boom, low aerodynamic drag, low landing and take-off noise, and light weight simultaneously are the key technologies for future supersonic airplanes. JAXA is promoting the R&D for these technologies based on our experiences of demonstrating the advanced low-drag and low-boom design concepts.

Reference URL

Please refer to ‘D-SEND project / Silent supersonic transport technology | Sky Frontier – Sky Frontier Program | Aeronautical Technology Directorate‘.

Reasons and benefits of using JAXA Supercomputer System

To achieve low sonic-boom, low aerodynamic drag, low landing and take-off noise, and light weight simultaneously, the multi-objective optimization tools are utilized in the design study. The super computer is necessary to obtain the multiple objective function efficiently with many numerical simulations.

Achievements of the Year

Buzz is self-excited oscillation phenomena of shock system, which appears at a supersonic diffuser of a supersonic inlet in subcritical operation. In order to suppress buzz, we proposed a new concept of supersonic inlet, which has a duct with constant cross-sectional area. Numerical analysis using the compressible fluid solver FaSTAR showed that flow field of the inlet based on proposed idea is more stable than traditional inlets.

Annual Reoprt Figures for 2019

Fig.1: Flow field and pressure time history

 

Publications

N/A

Usage of JSS2

Computational Information

  • Process Parallelization Methods: MPI
  • Thread Parallelization Methods: Automatic Parallelization
  • Number of Processes: 128
  • Elapsed Time per Case: 5.3 Hour(s)

Resources Used

 

Fraction of Usage in Total Resources*1(%): 0.53

 

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 4,149,941.89 0.50
SORA-PP 64,731.42 0.42
SORA-LM 884.46 0.37
SORA-TPP 0.00 0.00

 

File System Resources
File System Name Storage Assigned
(GiB)
Fraction of Usage*2(%)
/home 1,472.18 1.23
/data 60,358.42 1.03
/ltmp 13,085.94 1.11

 

Archiver Resources
Archiver Name Storage Used
(TiB)
Fraction of Usage*2(%)
J-SPACE 0.88 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.

JAXA Supercomputer System Annual Report April 2019-March 2020