Numerical analysis on atomization and spray combustion
JAXA Supercomputer System Annual Report February 2024-January 2025
Report Number: R24EA2150
Subject Category: Aeronautical Technology
- Responsible Representative: Junichi Kazawa, Japan Aerospace Exploration Agency, Aeronautical Technology Directorate, Aviation Environmental Sustainability Innovation Hub
- Contact Information: Kazuaki Matsuura, Japan Aerospace Exploration Agency, Aeronautical Technology Directorate, Aviation Environmental Sustainability Innovation Hub
- Members: Kazuaki Matsuura, Kinya Saito, Kodai Kato, Jun Iino, 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.
For response of fuel flow rate to back pressure oscillation, a linear-type response model was employed.
Effects of pilot injection response delays on frequencies and amplitudes of pressure oscillations in the combustor were investigated, with fixing response parameters on main injection.
An example of such results is shown in Figure 2.
Fig.1: Major part of numerical mesh for the combustor.
Fig.2: Effects of pilot injection response delays on frequencies and amplitudes of pressure oscillations in combustion instabilities.
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: 160 Hour(s)
JSS3 Resources Used
Fraction of Usage in Total Resources*1(%): 1.25
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 | 26706921.19 | 1.22 |
| TOKI-ST | 2349055.29 | 2.41 |
| TOKI-GP | 0.00 | 0.00 |
| TOKI-XM | 0.00 | 0.00 |
| TOKI-LM | 215.67 | 0.02 |
| 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 | 350.95 | 0.24 |
| /data and /data2 | 132246.67 | 0.63 |
| /ssd | 0.00 | 0.00 |
| 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) | 2.62 | 0.00 |
*2: Fraction of Usage：Percentage of usage relative to each resource used in one year.
JAXA Supercomputer System Annual Report February 2024-January 2025