Aerodynamic analysis of Japan’s next generation mainstay launch vehicle

JAXA Supercomputer System Annual Report February 2024-January 2025

Report Number: R24EEG60101

Subject Category: Research and Development

Responsible Representative: Hideaki Nanri, Director of Research Unit 4, Research and Development Directorate, Research Unit4
Contact Information: Mizuki Murakami(murakami.mizuki@jaxa.jp)
Members: Mizuki Murakami

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 for wind tunnel test 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

The results of CFD analyses which were corrected by the data from wind tunnel test were obtained using JSS. These results included the analytical results on many cases of aerodynamic characteristics data of the reusable 1st stage. This means the flight trajectory analysis of the vehicle is modified and the flight environmental condition of the vehicle becomes able to be estimated more precisely. Hence, the analytical results with JSS were very beneficial because designing the vehicle system and components is more progressing with these results.

Publications

N/A

Usage of JSS

Computational Information

Process Parallelization Methods: MPI
Thread Parallelization Methods: N/A
Number of Processes: 480 – 3840
Elapsed Time per Case: 24 Hour(s)

JSS3 Resources Used

Fraction of Usage in Total Resources*1(%): 0.41

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	11134701.75	0.51
TOKI-ST	70.09	0.00
TOKI-GP	0.00	0.00
TOKI-XM	944.21	0.46
TOKI-LM	2232.17	0.16
TOKI-TST	879.06	0.02
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	437.50	0.30
/data and /data2	27339.29	0.13
/ssd	717.14	0.04

Archiver Resources
Archiver Name	Storage Used (TiB)	Fraction of Usage*2(%)
J-SPACE	0.46	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.