Aerodynamic analysis of Japan’s next generation mainstay launch vehicle

JAXA Supercomputer System Annual Report February 2023-January 2024

Report Number: R23EEG60101

Subject Category: Research and Development

Responsible Representative: Koichi Okita, Director of Research Unit 4, Research and Development Directorate, Research Unit4
Contact Information: Mizuki Murakami(murakami.mizuki@jaxa.jp)
Members: Fumihiro Itoo, Kosuke Kawakami, Rei Matsuoka, Yukinori Morita, Takuya Ogura, Minoru Yoshimoto

Abstract

Japan’s next generation mainstay launch vehicle which reuses the first stage is being studied in order to reduce the space transportation cost drastically. The aerodynamic characteristics in the reentry phase is estimated analyticaly to evaluate the feasibility of vehicle system design using the analytical results.

Reference URL

N/A

Reasons and benefits of using JAXA Supercomputer System

Many cases of aerodynamic characteristics data of the 1st stage on the prameters of shape, velocity, attitude, are needed in order to evaluate the flight feasibility of the launch vehicle in the reentry phase.

JAXA super computer system is used to prepare the data set in a short period and supports the quick feasility study.

Achievements of the Year

Many cases of aerodynamic characteristics data of the reusable 1st stage were obtained with JSS3. Using the data, the design conditions of many components of the stage were almost settled and the design study on the vehicle was proceeded.

Publications

N/A

Usage of JSS

Computational Information

Process Parallelization Methods: MPI
Thread Parallelization Methods: N/A
Number of Processes: 960 – 4032
Elapsed Time per Case: 48 Hour(s)

JSS3 Resources Used

Fraction of Usage in Total Resources*1(%): 0.61

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	16411210.92	0.74
TOKI-ST	283.55	0.00
TOKI-GP	0.00	0.00
TOKI-XM	163.76	0.09
TOKI-LM	8399.20	0.64
TOKI-TST	84.78	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	466.67	0.39
/data and /data2	29161.91	0.18
/ssd	836.67	0.08

Archiver Resources
Archiver Name	Storage Used (TiB)	Fraction of Usage*2(%)
J-SPACE	0.53	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)	0.00	0.00

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