Investigation of internal flow of aircraft combustor for En-Core Project
JAXA Supercomputer System Annual Report April 2020-March 2021
Report Number: R20EA0714
Subject Category: Aeronautical Technology
- Responsible Representative: Takeshi Yamane(JAXA, Environmentally Compatible Core Engine Technology Research Project Team)
- Contact Information: Mitsumasa Makida(Aeronautical Technology Directorate)(makida.mitsumasa@jaxa.jp)
- Members: Mitsumasa Makida, Naoki Nakamura, Takashi Ishiyama
Abstract
In the development process of aircraft combustors, air mass flow distribution between fuel nozzles and cooling air holes on the liner effects performances of combustors. In this research, we conduct combustion simulations of internal flow inside the combustor which faithfully simulates the configuration of practical combustor. Then their results are applied as initial conditions for the acoustic calculation which are conducted to predict combustion oscillation.
Reference URL
N/A
Reasons and benefits of using JAXA Supercomputer System
It is important to do parametric case study with slightly different geometry, and each case needs large scale simulation. To conduct such simulation effectively, we need the super computer with high parallelization efficiency.
Achievements of the Year
In this fiscal year, we made numerical grids which faithfully simulates the configuration of practical combustor, then conducted internal simulations by a commercial code. These results were applied as initial conditions for the acoustic calculation by a commercial code. Then we investigated the oscillation mode.
Fig.1: Numerical grid for combustion calculation
Fig.2: Contour of temperature
Fig.3: Numerical grid for accousticc calculation
Fig.4: Contour of acoustic preseure
Publications
N/A
Usage of JSS
Computational Information
- Process Parallelization Methods: MPI
- Thread Parallelization Methods: Automatic Parallelization
- Number of Processes: 16
- Elapsed Time per Case: 50 Hour(s)
Resources Used(JSS2)
Fraction of Usage in Total Resources*1(%): 0.08
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 | 280,661.72 | 0.05 |
| SORA-PP | 42,553.17 | 0.33 |
| SORA-LM | 3.73 | 0.00 |
| SORA-TPP | 0.00 | 0.00 |
| File System Name | Storage Assigned(GiB) | Fraction of Usage*2(%) |
|---|---|---|
| /home | 73.15 | 0.07 |
| /data | 7,106.24 | 0.14 |
| /ltmp | 1,351.76 | 0.12 |
| Archiver Name | Storage Used(TiB) | Fraction of Usage*2(%) |
|---|---|---|
| J-SPACE | 1.59 | 0.05 |
*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(%): 0.07
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 | 151,231.36 | 0.03 |
| TOKI-RURI | 53,015.07 | 0.30 |
| TOKI-TRURI | 0.00 | 0.00 |
| File System Name | Storage Assigned(GiB) | Fraction of Usage*2(%) |
|---|---|---|
| /home | 80.02 | 0.05 |
| /data | 7,416.65 | 0.12 |
| /ssd | 42.23 | 0.02 |
| Archiver Name | Storage Used(TiB) | Fraction of Usage*2(%) |
|---|---|---|
| J-SPACE | 1.59 | 0.05 |
*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