JAXA Supercomputer System Annual Report April 2018-March 2019

Report Number: R18EA2150

Subject Category: Aeronautical Technology

PDF available here

• Responsible Representative: Toshio Nishizawa, Aeronautical Technology Directorate, Propulsion Research Unit
• 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 for using JSS2

In order to analyze a complicated atomization and spray combustion phenomena of a 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 numerical simultation on an aero-engine lean-staged fuel injector was performed for a condition at which combustion oscillation was observed in our experiment. It was also observed in the CFD result as shown in the figures below.

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

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

Publications

N/A

Usage of JSS2

Computational Information

• Process Parallelization Methods: MPI
• Thread Parallelization Methods: N/A
• Number of Processes: 512
• Elapsed Time per Case: 4 Hour(s)

Resources Used

Fraction of Usage in Total Resources*1(%): 1.78

Details

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

*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 2018-March 2019