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

JAXA Supercomputer System Annual Report February 2021-January 2022

Report Number: R21EBA30200

Subject Category: Aeronautical Technology

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

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

Preliminary numerical simulations for an annular combustor were performed in order to investigate azimuthal combustion instabilities.

In one of the simulation cases, a “spinning-mode” type instability was captured.

Fig.1: Major part of numerical mesh for the annular combustor.

Fig.2: Time evolution of pressure distribution during an oscillation cycle.

Fig.3: Time evolution of pressure at monitoring positions in the combustion chamber.

Fig.4: Frequency spectra of pressure in the combustion chamber.

Publications

N/A

Usage of JSS

Computational Information

Process Parallelization Methods: MPI
Thread Parallelization Methods: N/A
Number of Processes: 2100
Elapsed Time per Case: 76 Hour(s)

JSS3 Resources Used

Fraction of Usage in Total Resources*1(%): 4.20

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	98697375.20	4.80
TOKI-ST	268729.79	0.33
TOKI-GP	0.00	0.00
TOKI-XM	0.00	0.00
TOKI-LM	4393.04	0.33
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	283.84	0.28
/data and /data2	185057.77	1.98
/ssd	376.71	0.10

Archiver Resources
Archiver Name	Storage Used (TiB)	Fraction of Usage*2(%)
J-SPACE	0.09	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.

ISV Software Licenses Used

ISV Software Licenses Resources
	ISV Software Licenses Used (Hours)	Fraction of Usage*2(%)
ISV Software Licenses (Total)	4215.96	2.95

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