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

JAXA Supercomputer System Annual Report April 2019-March 2020

Report Number: R19EBA30200

Subject Category: Aeronautical Technology

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, Asuka Akino, Toshio Matsuno, Harumi Toriyama

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 numerical simulation on an aero-engine lean-staged fuel injector was performed for a conditon 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: 104 Hour(s)

Resources Used

Fraction of Usage in Total Resources*1(%): 0.96

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	8,597,280.89	1.04
SORA-PP	0.00	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	381.56	0.32
/data	44,675.39	0.76
/ltmp	13,495.17	1.15

Archiver Resources
Archiver Name	Storage Used (TiB)	Fraction of Usage*2(%)
J-SPACE	0.11	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.