Numerical analysis on atomization and spray combustion
JAXA Supercomputer System Annual Report April 2020-March 2021
Report Number: R20EA2150
Subject Category: Aeronautical Technology
- Responsible Representative: Tatsuya Ishii, Propulsion Research Unit, Aeronautical Technology Directorate
- Contact Information: Kazuaki Matsuura, Japan Aerospace Exploration Agency, Aeronautical Technology Directorate, Propulsion Research Unit(matsuura.kazuaki@jaxa.jp)
- Members: Kazuaki Matsuura, Naoki Nakamura, Mitsumasa Makida, Huilai Zhang, Jun Iino, Kinya Saito
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
A preliminary investigation on models on the effects of fuel-supply response to oscillating air flows was performed for combustion-oscillation conditions with influence of the downstream duct of the test rig.
As a result, different oscillation modes and their frequencies were observed depending on the response models.
Fig.1: Frequency spectrum of pressure in the combustion chamber.
Fig.2: Spatial distributions of r.m.s. values of pressure oscillations.
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: 96 Hour(s)
Resources Used(JSS2)
Fraction of Usage in Total Resources*1(%): 0.46
Details
Please refer to System Configuration of JSS2 for the system configuration and major specifications of JSS2.
| System Name | Amount of Core Time(core x hours) | Fraction of Usage*2(%) |
|---|---|---|
| SORA-MA | 2,719,282.99 | 0.51 |
| SORA-PP | 597.48 | 0.00 |
| SORA-LM | 0.00 | 0.00 |
| SORA-TPP | 0.00 | 0.00 |
| File System Name | Storage Assigned(GiB) | Fraction of Usage*2(%) |
|---|---|---|
| /home | 315.91 | 0.29 |
| /data | 26,369.97 | 0.51 |
| /ltmp | 2,700.34 | 0.23 |
| Archiver Name | Storage Used(TiB) | Fraction of Usage*2(%) |
|---|---|---|
| J-SPACE | 0.10 | 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.
Resources Used(JSS3)
Fraction of Usage in Total Resources*1(%): 0.18
Details
Please refer to System Configuration of JSS3 for the system configuration and major specifications of JSS3.
| System Name | Amount of Core Time(core x hours) | Fraction of Usage*2(%) |
|---|---|---|
| TOKI-SORA | 897,540.05 | 0.19 |
| TOKI-RURI | 100.65 | 0.00 |
| TOKI-TRURI | 0.00 | 0.00 |
| File System Name | Storage Assigned(GiB) | Fraction of Usage*2(%) |
|---|---|---|
| /home | 325.29 | 0.22 |
| /data | 26,633.14 | 0.45 |
| /ssd | 134.42 | 0.07 |
| Archiver Name | Storage Used(TiB) | Fraction of Usage*2(%) |
|---|---|---|
| J-SPACE | 0.10 | 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.
JAXA Supercomputer System Annual Report April 2020-March 2021