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Numerical analysis on fuel injector design

JAXA Supercomputer System Annual Report February 2022-January 2023

Report Number: R22EBA30201

Subject Category: Aeronautical Technology

PDF available here

  • 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, 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 its numerical evaluation were carried out. As a result, thermal-protection performance of the injector was improved (at least in numerical space). An example of suppression of wet-wall temperature of one of the fuel circuits in the injector by improved design is presented in Figure 1.

Annual Reoprt Figures for 2022

Fig.1: 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 – 4096
  • Elapsed Time per Case: 165 Hour(s)

JSS3 Resources Used

 

Fraction of Usage in Total Resources*1(%): 0.68

 

Details

Please refer to System Configuration of JSS3 for the system configuration and major specifications of JSS3.

Computational Resources
System Name CPU Resources Used
(Core x Hours)
Fraction of Usage*2(%)
TOKI-SORA 18516172.72 0.81
TOKI-ST 5554.52 0.01
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 Resources
File System Name Storage Assigned
(GiB)
Fraction of Usage*2(%)
/home 190.32 0.17
/data and /data2 169864.00 1.31
/ssd 228.33 0.03

 

Archiver Resources
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 Resources
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 2022-January 2023