Numerical analysis on fuel injector design
JAXA Supercomputer System Annual Report February 2023-January 2024
Report Number: R23EBA30201
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, Kinya Saito, Kunihiko Sakata, Aya Yoshida
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 its numerical evaluation were carried out. As a result, thermal-protection performance of the injector was improved (at least in numerical space). Schematic drawing of the injector, and an example of suppression of wet-wall temperature near the exit of the pilot fuel circuit are presented in Figure 1 and 2, respectively.
Fig.1: Schematic drawing of the fuel injector.
Fig.2: Example of suppression of wet-wall temperature of fuel circuit by improved injector design.
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: 144 Hour(s)
JSS3 Resources Used
Fraction of Usage in Total Resources*1(%): 0.66
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 | 18042433.00 | 0.81 |
| TOKI-ST | 38.21 | 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 | 167.08 | 0.14 |
| /data and /data2 | 168615.00 | 1.04 |
| /ssd | 0.00 | 0.00 |
| 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 2023-January 2024