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Investigation of internal flow of aircraft combustor for En-Core Project.

JAXA Supercomputer System Annual Report February 2022-January 2023

Report Number: R22EA0714

Subject Category: Aeronautical Technology

PDF available here

  • Responsible Representative: Mitsumasa Makida(JAXA, Aeronautical Technology Directorate)
  • Contact Information: Mitsumasa Makida(Aeronautical Technology Directorate)(makida.mitsumasa@jaxa.jp)
  • Members: Mitsumasa Makida, Naoki Nakamura, Takashi Ishiyama

Abstract

In the development process of aircraft combustors, air mass flow distribution between fuel nozzles and cooling air holes on the liner effects performances of combustors. In this research, we conduct combustion simulations of internal flow inside the combustor which faithfully simulates the configuration of practical combustor. Then their results are applied as initial conditions for the acoustic calculation which are conducted to predict combustion oscillation.

Reference URL

N/A

Reasons and benefits of using JAXA Supercomputer System

It is important to do parametric case study with slightly different geometry, and each case needs large scale simulation. To conduct such simulation effectively, we need the super computer with high parallelization efficiency.

Achievements of the Year

In this fiscal year, we made numerical grids which faithfully simulates the configuration of practical annular combustor, then conducted internal simulations by a commercial code. These results were applied as initial conditions for the acoustic calculation by a commercial code. Then we investigated the oscillation mode.

Annual Reoprt Figures for 2022

Fig.1: Numerical region for combustion calculation

 

Annual Reoprt Figures for 2022

Fig.2: Numerical grid for acoustic calculation

 

Annual Reoprt Figures for 2022

Fig.3: Contour of acoustic pressure and phase angle on each plane

 

Publications

N/A

Usage of JSS

Computational Information

  • Process Parallelization Methods: MPI
  • Thread Parallelization Methods: Automatic Parallelization
  • Number of Processes: 36
  • Elapsed Time per Case: 192 Hour(s)

JSS3 Resources Used

 

Fraction of Usage in Total Resources*1(%): 0.29

 

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 7625984.93 0.33
TOKI-ST 36244.27 0.04
TOKI-GP 0.00 0.00
TOKI-XM 0.00 0.00
TOKI-LM 10008.56 0.67
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 72.90 0.07
/data and /data2 7375.05 0.06
/ssd 37.50 0.01

 

Archiver Resources
Archiver Name Storage Used
(TiB)
Fraction of Usage*2(%)
J-SPACE 3.49 0.02

*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)
859.12 0.60

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

JAXA Supercomputer System Annual Report February 2022-January 2023