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Research on the performance improvement of practical aero-engine fuel injector

JAXA Supercomputer System Annual Report February 2022-January 2023

Report Number: R22EBA30200

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, Kinya Saito, Takahiro Inagawa, Jun Iino, Kunihiko Sakata, Aya Yoshida, Kodai Kato, Mitsumasa Makida, Naoki Nakamura

Abstract

Our study is focusing on the improvement of fuel injector performance. Numerical simulations on air-flow, atomization, fuel/air mixing, combustion, and thermal analysis on such injectors in realistic shapes are of our interest.

Reference URL

N/A

Reasons and benefits of using JAXA Supercomputer System

In order to analyze air-flow, atomization, fuel/air mixing, combustion, and thermal analysis of a realistic shape fuel nozzle precisely, we conduct the flamelet combustion analysis using large size of database, and the use of super computer is necessary.

Achievements of the Year

Numerical simulations for an annular combustor were performed in order to investigate its combustion instabilities.

Two cases were studied: Case I with all of twelve fuel injectors in the same design (Design A) , and Case II with six of fuel injectors in Design A and the rest in Design B.

The difference between the two cases in terms of characteristics of combustion instability was successfully captured.

Annual Reoprt Figures for 2022

Fig.1: Major part of numerical mesh for the annular combustor.

 

Annual Reoprt Figures for 2022

Fig.2: Time evolution of pressure at monitoring positions in the combustion chamber.

 

Publications

N/A

Usage of JSS

Computational Information

  • Process Parallelization Methods: MPI
  • Thread Parallelization Methods: N/A
  • Number of Processes: 2100
  • Elapsed Time per Case: 120 Hour(s)

JSS3 Resources Used

 

Fraction of Usage in Total Resources*1(%): 2.89

 

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 77773063.81 3.39
TOKI-ST 192921.96 0.19
TOKI-GP 0.00 0.00
TOKI-XM 0.00 0.00
TOKI-LM 23480.13 1.57
TOKI-TST 2366.29 0.06
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 266.15 0.24
/data and /data2 187357.33 1.44
/ssd 299.17 0.04

 

Archiver Resources
Archiver Name Storage Used
(TiB)
Fraction of Usage*2(%)
J-SPACE 0.09 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)
3419.09 2.38

*2: Fraction of Usage:Percentage of usage relative to each resource used in one year.

JAXA Supercomputer System Annual Report February 2022-January 2023