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Numerical analysis on atomization and spray combustion

JAXA Supercomputer System Annual Report April 2020-March 2021

Report Number: R20EA2150

Subject Category: Aeronautical Technology

PDF available here

  • Responsible Representative: Tatsuya Ishii, Propulsion Research Unit, Aeronautical Technology Directorate
  • Contact Information: Kazuaki Matsuura, Japan Aerospace Exploration Agency, Aeronautical Technology Directorate, Propulsion Research Unit(matsuura.kazuaki@jaxa.jp)
  • Members: Kazuaki Matsuura, Naoki Nakamura, Mitsumasa Makida, Huilai Zhang, Jun Iino, Kinya Saito

Abstract

A numerical study is performed to clarify phenomena on atomization and spray combustion.

Reference URL

N/A

Reasons and benefits of using JAXA Supercomputer System

Phenomena on atomization and spray combustion require a high calculation load, and the use of super computer is necessary.

Achievements of the Year

A preliminary investigation on models on the effects of fuel-supply response to oscillating air flows was performed for combustion-oscillation conditions with influence of the downstream duct of the test rig.

As a result, different oscillation modes and their frequencies were observed depending on the response models.

Annual Reoprt Figures for 2020

Fig.1: Frequency spectrum of pressure in the combustion chamber.

 

Annual Reoprt Figures for 2020

Fig.2: Spatial distributions of r.m.s. values of pressure oscillations.

 

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: 96 Hour(s)

Resources Used(JSS2)

 

Fraction of Usage in Total Resources*1(%): 0.46

 

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 2,719,282.99 0.51
SORA-PP 597.48 0.00
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 315.91 0.29
/data 26,369.97 0.51
/ltmp 2,700.34 0.23

 

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(%): 0.18

 

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 897,540.05 0.19
TOKI-RURI 100.65 0.00
TOKI-TRURI 0.00 0.00

 

File System Resources
File System Name Storage Assigned
(GiB)
Fraction of Usage*2(%)
/home 325.29 0.22
/data 26,633.14 0.45
/ssd 134.42 0.07

 

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