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Hydrogen Application to Aircraft and Future Space Transportation System

JAXA Supercomputer System Annual Report February 2021-January 2022

Report Number: R21EA2121

Subject Category: Aeronautical Technology

PDF available here

  • Responsible Representative: Sadatake Tomioka, Leader, Hydrogen Aerospace Plane Team
  • Contact Information: Hideyuki Taguchi(taguchi.hideyuki@jaxa.jp)
  • Members: Manami Fujii, Mizuki Fukazawa, Motoyuki Hongoh, Yusuke Hoshiya, Daiki Ito, Yuki Kuwabara, Masafumi Momose, Koichi Omi, Junichi Oki, Takahiro Terao, Nozomi Takaki, Rintaro Tanaka, Hideyuki Taguchi, Kotaro Yamada, Kotaro Yoshihara, Kazutaka Yamada

Abstract

This research aims at the demonstration of the thrust control method of a hypersonic pre-cooled turbojet engine using liquid hydrogen fuel and the aircraft / propulsion integrated control method. We acquire the control characteristics of the hypersonic integrated control experiment aircraft to establish the aircraft / propulsion integrated control method taking into account the mutual interference of hypersonic airframe and hypersonic engines. In addition to defining the required specifications of hypersonic aircraft, we present the design specifications of the hypersonic experimental aircraft for carrying out flight demonstration of hypersonic pre-cooled turbojet engine.

Reference URL

N/A

Reasons and benefits of using JAXA Supercomputer System

We need a long calcularion time to obtaine the aerodynamic characteristics of the overall hypersonic experimental aircraft by CFD analyses.

Achievements of the Year

LES of combustion inside the model afterburner of pre-cooled turbojet engine with single injector. Two case of different injection hole diameter(1.0 mm and 1.4 mm) at equivalence ratio of 2.3 were conducted.

The aerodynamic characteristic of low-speed experimental aircraft with engine nacels on the main wings and with landing gears and a pulse detnation engine under the body was evaluaetd by CFD.

Annual Reoprt Figures for 2021

Fig.1: moler fraction of H2,O2, H20, equivalence ratio and temperature distribution at the plane including 60 deg injection hole.

 

Annual Reoprt Figures for 2021

Fig.2: Low-Speed Experimental Aircraft (Pressure Coefficient Contour, Mach 0.147, AoA: 0deg)

 

Annual Reoprt Figures for 2021

Fig.3: Low-Speed Experimental Aircraft (Longitudinal Three Component Force Compared With Wind Tunnel Test, Mach 0.147)

 

Publications

– Non peer-reviewed papers

Mizuki Fukazawa, Tomonari Hirotani, Hideyuki Taguchi, Kazumasa Kamisori, Asei Tezuka, Evaluation of effect on model support method in a low speed wind tunnel test of double delta wing aircraft with engines, 59th Aircraft Symposium, 2021.

– Oral Presentations

Mizuki Fukazawa, Tomonari Hirotani, Hideyuki Taguchi, Kazumasa Kamisori, Asei Tezuka, Evaluation of effect on model support method in a low speed wind tunnel test of double delta wing aircraft with engines, 59th Aircraft Symposium, 2021.

Usage of JSS

Computational Information

  • Process Parallelization Methods: MPI
  • Thread Parallelization Methods: OpenMP
  • Number of Processes: 1 – 2
  • Elapsed Time per Case: 30 Hour(s)

JSS3 Resources Used

 

Fraction of Usage in Total Resources*1(%): 1.03

 

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 21710483.50 1.06
TOKI-ST 654819.28 0.81
TOKI-GP 6590.92 4.38
TOKI-XM 0.00 0.00
TOKI-LM 650.20 0.05
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 2868.33 2.85
/data and /data2 113047.33 1.21
/ssd 6503.33 1.68

 

Archiver Resources
Archiver Name Storage Used
(TiB)
Fraction of Usage*2(%)
J-SPACE 8.78 0.06

*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)
2725.54 1.91

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

JAXA Supercomputer System Annual Report February 2021-January 2022