Numerical analysis on fuel injector design
JAXA Supercomputer System Annual Report February 2021-January 2022
Report Number: R21EBA30201
Subject Category: Aeronautical Technology
- Responsible Representative: Takashi Yamane, Aeronautical Technology Directorate, En-Core Project team
- Contact Information: Kazuaki Matsuura, Japan Aerospace Exploration Agency, Aeronautical Technology Directorate, En-Core Project team(matsuura.kazuaki@jaxa.jp)
- Members: Kazuaki Matsuura, Jun Iino, Takahiro Inagawa, Kinya Saito, Huilai Zhang, Aya Yoshida, Kunihiko Sakata
Abstract
Numerical simulations of thermofluid dynamics are performed to optimize fuel injector design.
Reference URL
N/A
Reasons and benefits of using JAXA Supercomputer System
The use of supercomputer is necessary due to high computational load of thermofluid analysis on fuel injectors in complex design.
Achievements of the Year
In order to avoid fuel coking in fuel circuits of a coaxially-staged lean-burn fuel injector, development cycle of thermal-protection design and of its numerical evaluation was carried out. As a result, thermal-protection performance of the injector was improved (at least in numerical space). Furthermore, the results of CFD and of the corresponding experiment on injector-wall temperature were compared to each other for CFD validation. Both results showed good agreement at a certain airflow condition as shown in the figure below, but the validation should be further conducted at different conditions.
Fig.1: Relationship between fuel flow rate and wall temperature at a monitoring point: Comparison between CFD and experiment.
Publications
N/A
Usage of JSS
Computational Information
- Process Parallelization Methods: MPI
- Thread Parallelization Methods: N/A
- Number of Processes: 1024
- Elapsed Time per Case: 165 Hour(s)
JSS3 Resources Used
Fraction of Usage in Total Resources*1(%): 1.01
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 | 24048953.55 | 1.17 |
| TOKI-ST | 2732.71 | 0.00 |
| TOKI-GP | 0.00 | 0.00 |
| TOKI-XM | 0.00 | 0.00 |
| TOKI-LM | 0.00 | 0.00 |
| 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 | 193.32 | 0.19 |
| /data and /data2 | 70024.00 | 0.75 |
| /ssd | 253.33 | 0.07 |
| Archiver Name | Storage Used(TiB) | Fraction of Usage*2(%) |
|---|---|---|
| J-SPACE | 0.00 | 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