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Basic research for system integration of silent supersonic airplane

JAXA Supercomputer System Annual Report February 2022-January 2023

Report Number: R22ETET01

Subject Category: Skills Acquisition System

PDF available here

  • Responsible Representative: Yoshikazu Makino, Aviation Technology Directorate, Silence Supersonic Aircraft Team
  • Contact Information: Hiroaki Ishikawa(ishikawa.hiroaki2@jaxa.jp)
  • Members: Hiroaki Ishikawa, Issei Kikura, Yoshikazu Makino, Takuma Tsuda, Taiga Ueno

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 http://www.aero.jaxa.jp/eng/research/frontier/sst/ .

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. A supercomputer is necessary to efficiently evaluate these multiple evaluations.

Achievements of the Year

Trim improvement by canards has been considered in the design of low-boom supersonic aircraft. However, the shock wave from the canard itself degrades the its low-boom performance. In this study, effective canard geometry for both low boom performance and trim performance were investigated by examining the canard area required for trimmed flight and its low-boom performance. The canard area was determined and the near-field pressure signature was estimated by CFD calculation by using FaSTAR (Fig. 1), and the near-field pressure signatre was modified by Multipole Analysis by using MPnoise. Then, acoustic propagation analysis by using Xnoise was performed on the modified near-field pressure signature to estimate the sonic boom on the ground. As a result, it was confirmed that the ground pressure signature was improved by the canard geometry and appropriate low-boom fuselage design that cancels the shock wave (Figure 2), thus reducing sonic boom strength compared to the original geometry. The trade-off relationship between canard area and low-boom performance due to canard geometry was also clarified.

Annual Reoprt Figures for 2022

Fig.1: CFD calculationfor both original and designed canard

 

Annual Reoprt Figures for 2022

Fig.2: Improvement of ground pressure signature by canard and low-boom fuselage design

 

Publications

N/A

Usage of JSS

Computational Information

  • Process Parallelization Methods: MPI
  • Thread Parallelization Methods: Automatic Parallelization
  • Number of Processes: 384 – 1024
  • Elapsed Time per Case: 13 Hour(s)

JSS3 Resources Used

 

Fraction of Usage in Total Resources*1(%): 0.26

 

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 6190385.72 0.27
TOKI-ST 143264.77 0.14
TOKI-GP 0.00 0.00
TOKI-XM 0.00 0.00
TOKI-LM 2078.47 0.14
TOKI-TST 1.06 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 1006.67 0.91
/data and /data2 68956.67 0.53
/ssd 10306.67 1.43

 

Archiver Resources
Archiver Name Storage Used
(TiB)
Fraction of Usage*2(%)
J-SPACE 0.65 0.00

*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)
3041.83 2.12

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

JAXA Supercomputer System Annual Report February 2022-January 2023