Research and Development of Emission Free Aircraft Technologies

JAXA Supercomputer System Annual Report February 2024-January 2025

Report Number: R24EDA102H01

Subject Category: Aeronautical Technology

Responsible Representative: Akira Nishizawa, Aeronautical Technology Directorate
Contact Information: Yuzuru Yokokawa(yokokawa.yuzuru@jaxa.jp)
Members: Keisuke Sugaya, Kanako Yasue, Hiroshi Kobayashi, Takayuki Sakurai, Hiroto Sato, Hirotaka Tsutsui, Yuki Kishi, Yuzuru Yokokawa

Abstract

With the ultimate goal of achieving emission-free (zero emissions) aircraft, research and development of electric hybrid propulsion system is conducted, which includes the WAT(Wake Adaptive Thruster) fans at the end of fuselage, and new configuration of electric aircraft that apply them, as well as system demonstration project.

Reference URL

Please refer to 'MEGAWATT project | Sky Green+ | Research & Development | Aviation Technology Directorate'.

Reasons and benefits of using JAXA Supercomputer System

The JSS3 is used to design a passenger aircraft equipped with an turbo-electric hybrid propulsion system. Because a huge computational resource is required to handle both thermodynamics and aerodynamics of fully configurated aircraft, JSS3 is essential for the execution of this research and development.

Achievements of the Year

This year, a fuel consumption estimation analysis of the aerodynamic geometry of an electric hybrid aircraft with WAT fan was conducted. FaSTAR-Move with a propulsion fan model analysis module was used as a solver to estimate fuel consumption, which includs interference with the propulsion system. In addition, inlet distortion of intake flow was assessed in that analysis. (Fig. 1)

Fig.1: Comparison of tail fan configuration for electric hybrid aircraft

Publications

N/A

Usage of JSS

Computational Information

Process Parallelization Methods: MPI
Thread Parallelization Methods: OpenMP
Number of Processes: 36 - 768
Elapsed Time per Case: 12 Hour(s)

JSS3 Resources Used

Fraction of Usage in Total Resources*1(%): 0.76

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	19708616.88	0.90
TOKI-ST	36802.51	0.04
TOKI-GP	0.00	0.00
TOKI-XM	0.00	0.00
TOKI-LM	10911.90	0.79
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	1217.55	0.82
/data and /data2	150582.19	0.72
/ssd	32434.89	1.74

Archiver Resources
Archiver Name	Storage Used (TiB)	Fraction of Usage*2(%)
J-SPACE	20.42	0.07

*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)	1673.51	1.14

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