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

JAXA Supercomputer System Annual Report April 2020-March 2021

Report Number: R20EBA30200

Subject Category: Aeronautical Technology

PDF available here

  • Responsible Representative: Takashi Yamane, Aeronautical Technology Directorate, En-Core Pre-project team
  • Contact Information: Kazuaki Matsuura, Japan Aerospace Exploration Agency, Aeronautical Technology Directorate, En-Core Project team(matsuura.kazuaki@jaxa.jp)
  • Members: Kazuaki Matsuura, Mitsumasa Makida, Naoki Nakamura, Jun Iino, Huilai Zhang, Kinya Saito, Kunihiko Sakata, Harumi Toriyama, Takahiro Inagawa, Aya Yoshida

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

A preliminary numerical simulation for combustion oscillation in the combustor with a choked outlet was performed. Pressure oscillation at a single dominant frequency was observed. The r.m.s. values of the pressure oscillation on the central axis were nearly constant in a wide range of axial locations.

Annual Reoprt Figures for 2020

Fig.1: Time evolution of temperature distribution during an oscillation cycle.

 

Annual Reoprt Figures for 2020

Fig.2: Frequency spectrum of pressure in the combustion chamber.

 

Annual Reoprt Figures for 2020

Fig.3: Distributions of r.m.s. values of pressure oscillations on the central axis.

 

Publications

N/A

Usage of JSS

Computational Information

  • Process Parallelization Methods: MPI
  • Thread Parallelization Methods: N/A
  • Number of Processes: 512
  • Elapsed Time per Case: 119 Hour(s)

Resources Used(JSS2)

 

Fraction of Usage in Total Resources*1(%): 1.70

 

Details

Please refer to System Configuration of JSS2 for the system configuration and major specifications of JSS2.

Computational Resources
System Name Amount of Core Time
(core x hours)
Fraction of Usage*2(%)
SORA-MA 10,025,652.16 1.90
SORA-PP 11,250.51 0.09
SORA-LM 0.00 0.00
SORA-TPP 0.00 0.00

 

File System Resources
File System Name Storage Assigned
(GiB)
Fraction of Usage*2(%)
/home 364.23 0.33
/data 72,003.95 1.39
/ltmp 11,814.93 1.01

 

Archiver Resources
Archiver Name Storage Used
(TiB)
Fraction of Usage*2(%)
J-SPACE 0.10 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.

 

Resources Used(JSS3)

 

Fraction of Usage in Total Resources*1(%): 1.56

 

Details

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

Computational Resources
System Name Amount of Core Time
(core x hours)
Fraction of Usage*2(%)
TOKI-SORA 8,060,150.54 1.73
TOKI-RURI 64,742.23 0.37
TOKI-TRURI 0.00 0.00

 

File System Resources
File System Name Storage Assigned
(GiB)
Fraction of Usage*2(%)
/home 370.43 0.25
/data 72,235.32 1.21
/ssd 547.68 0.29

 

Archiver Resources
Archiver Name Storage Used
(TiB)
Fraction of Usage*2(%)
J-SPACE 0.10 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.

JAXA Supercomputer System Annual Report April 2020-March 2021