Numerical Plasma Simulation on Advanced Space Propulsion Systems
JAXA Supercomputer System Annual Report February 2021-January 2022
Report Number: R21EU0904
Subject Category: Space and Astronautical Science
- Responsible Representative: Ikkoh Funaki, Professor, ISAS
- Contact Information: Ikkoh Funaki(funaki.ikkoh@jaxa.jp)
- Members: Ryuta Futada, Yuki Murayama
Abstract
Due to the limitation of the existing spacecraft technology level, it is very difficult to enable solar system explorations in a quick and cost-effective mannger. Objective of this study is to obtain a breakthrough spacecraft propulsion technology that enables solar system exploration of the next generations.
Reference URL
N/A
Reasons and benefits of using JAXA Supercomputer System
Design optimization of spacecraft propulsion requires a huge computer resource, hence supercomputer usage is very important.
Achievements of the Year
Magnetoplasma Sail, MPS, is a space propulsion system using the interactions between the solar wind and the artificial magnetic field generated by the onboard coil. MPS performs magnetospheric inflation by the plasma injection. There are two mechanisms on the magnetospheric inflation: the effect of extending the magnetic field line due to the dynamic pressure and the effect of augmenting the magnetic moment due to the thermal pressure. We clarified the optimal injection plasma conditions considering the thermal and dynamic pressure. The thrust improved as the thermal pressure and the dynamic pressures increased, but the thrust gain was limited of 2.3. The reason why the thrust gain was limited was that when either the thermal or the dynamic pressure is superabundance, the magnetic sound wave increases and shock waves are formed in the magnetosphere, blocking the thrust transfer. The temperature and density of the injected plasma tend to increase the magnetic sound waves. As optimal conditions for plasma injection that could achieve high thrust, we proposed the low power conditions with low dynamic pressure, high density and low temperature, or high specific impulse conditions with relatively high dynamic pressure, low temperature and low density.
Publications
- Non peer-reviewed papers
Yuki Murayama, Ryota Hara, Yoshiki Yamagiwa, Yuya Oshio, Hiroyuki Nishida, Ikkoh Funaki, Magnetohydrodynamic Analysis of Magnetoplasma Sail for Plasma Injection Angle considering Thermal Pressure and Dynamic Pressure, 33rd International Symposium on Space Technology and Science, ISTS-2022-b-42, Oita, Feb.-Mar. 2022.
Usage of JSS
Computational Information
- Process Parallelization Methods: N/A
- Thread Parallelization Methods: Automatic Parallelization
- Number of Processes: 1
- Elapsed Time per Case: 10 Hour(s)
JSS3 Resources Used
Fraction of Usage in Total Resources*1(%): 0.02
Details
Please refer to System Configuration of JSS3 for the system configuration and major specifications of JSS3.
| System Name | CPU Resources Used(Core x Hours) | Fraction of Usage*2(%) |
|---|---|---|
| TOKI-SORA | 148837.27 | 0.01 |
| TOKI-ST | 91733.80 | 0.11 |
| TOKI-GP | 0.00 | 0.00 |
| TOKI-XM | 0.00 | 0.00 |
| TOKI-LM | 0.00 | 0.00 |
| TOKI-TST | 0.00 | 0.00 |
| TOKI-TGP | 0.00 | 0.00 |
| TOKI-TLM | 0.00 | 0.00 |
| File System Name | Storage Assigned(GiB) | Fraction of Usage*2(%) |
|---|---|---|
| /home | 130.00 | 0.13 |
| /data and /data2 | 800.00 | 0.01 |
| /ssd | 800.00 | 0.21 |
| Archiver Name | Storage Used(TiB) | Fraction of Usage*2(%) |
|---|---|---|
| J-SPACE | 0.00 | 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 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.
JAXA Supercomputer System Annual Report February 2021-January 2022