Study of Green engine (study of ultrahigh-temperature low NOx emission combustor technology) atomization process of a fuel spray nozzle in a practical geometry
JAXA Supercomputer System Annual Report April 2017-March 2018
Report Number: R17EA0730
Subject Category: Aeronautical Technology
- Responsible Representative: Toshiya Nakamura, Aeronautical Technology Directorate, Next Generation Aeronautical Innovation Hub Center
- Contact Information: Kazuaki Matsuura matsuura.kazuaki@jaxa.jp
- Members: Kazuaki Matsuura, Mitsumasa Makida, Naoki Nakamura, Jun Iino, Huilai Zhang
Abstract
The atomization process occurs in the narrow region which is vicinity of the injection outlet in a practical geometry fuel injector under development in Green engine project. Therefore, it is difficult to understand the atomization phenomena only by experiment. The objective of this work is to understand the atomization mechanism by numerical study which calculated the atomization field in the near region of the injection outlet.
Reference URL
N/A
Reasons for using JSS2
The particle diameter is order of 10 micron in the experiment. In order to calculate this size of atomization field precisely,
large scale calculation with more than a few of hundred million of cells which size is a few micron meter order is needed and
the use of super computer is necessary.
Achievements of the Year
Numerical analysis with VOF method of the fuel atomization field is conducted and revealed the condition of the particles broken up from different speed of cross-flow jets.
Fig.1: Atomization process of fuel spray nozzle in a practical geometry. Side view (Green:High speed cross flow jet, Yellow:Low speed cross flow jet)
Fig.2: Atomization process of fuel spray nozzle in a practical geometry. Upper view (Green:High speed cross flow jet, Yellow:Low speed cross flow jet)
Publications
N/A
Usage of JSS2
Computational Information
- Process Parallelization Methods: MPI
- Thread Parallelization Methods: N/A
- Number of Processes: 768
- Elapsed Time per Case: 140.00 hours
Resources Used
Fraction of Usage in Total Resources*1(%): 1.60
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 | 13,261,007.18 | 1.76 |
| SORA-PP | 0.00 | 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 | 120.43 | 0.08 |
| /data | 32,610.17 | 0.60 |
| /ltmp | 5,099.83 | 0.38 |
| Archiver Name | Storage Used(TiB) | Fraction of Usage*2(%) |
|---|---|---|
| J-SPACE | 0.14 | 0.01 |
*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 2017-March 2018