Numerical analysis on atomization and spray combustion
JAXA Supercomputer System Annual Report February 2021-January 2022
Report Number: R21EA2150
Subject Category: Aeronautical Technology
- Responsible Representative: Tatsuya Ishii, Aeronautical Technology Directorate, Aviation Environmental Sustainability Innovation Hub
- Contact Information: Kazuaki Matsuura, Japan Aerospace Exploration Agency, Aeronautical Technology Directorate, Aviation Environmental Sustainability Innovation Hub(matsuura.kazuaki@jaxa.jp)
- Members: Kazuaki Matsuura, Kinya Saito, Jun Iino, Huilai Zhang, Naoki Nakamura, Mitsumasa Makida
Abstract
A numerical study is performed to clarify phenomena on atomization and spray combustion.
Reference URL
N/A
Reasons and benefits of using JAXA Supercomputer System
Phenomena on atomization and spray combustion require a high calculation load, and the use of super computer is necessary.
Achievements of the Year
Numerical simulations were performed to investigate combustion instabilities on a coaxially-staged lean-burn fuel injector.
Pressure oscillation amplitudes and dominant oscillation frequencies obtained by the CFD and by the corresponding experiment were generally in good agreement.
Fig.1: Time evolution of temperature distribution during an oscillation cycle.
Fig.2: Frequency spectrum of pressure in the combustion chamber.
Publications
N/A
Usage of JSS
Computational Information
- Process Parallelization Methods: MPI
- Thread Parallelization Methods: N/A
- Number of Processes: 512
- Elapsed Time per Case: 120 Hour(s)
JSS3 Resources Used
Fraction of Usage in Total Resources*1(%): 1.22
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 | 28964176.41 | 1.41 |
| TOKI-ST | 37251.97 | 0.05 |
| TOKI-GP | 0.00 | 0.00 |
| TOKI-XM | 0.00 | 0.00 |
| TOKI-LM | 910.92 | 0.07 |
| 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 | 258.84 | 0.26 |
| /data and /data2 | 26337.77 | 0.28 |
| /ssd | 126.71 | 0.03 |
| Archiver Name | Storage Used(TiB) | Fraction of Usage*2(%) |
|---|---|---|
| J-SPACE | 0.09 | 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