Numerical analysis on atomization and spray combustion

JAXA Supercomputer System Annual Report February 2022-January 2023

Report Number: R22EA2150

Subject Category: Aeronautical Technology

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Responsible Representative: Tatsuya Ishii, Aeronautical Technology Directorate, Aviation Environmental Sustainability Innovation Hub
Contact Information: Kazuaki Matsuura, Japan Aerospace Exploration Agency, Aeronautical Technology Directorate, Aviation Environmental Sustainability Innovation Hub(matsuura.kazuaki@jaxa.jp)
Members: Kazuaki Matsuura, Kinya Saito, Jun Iino, Naoki Nakamura, Mitsumasa Makida

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

Numerical simulations were performed to investigate combustion instabilities on a coaxially-staged lean-burn fuel injector.

The dominant oscillation frequency obtained by the CFD was in good agreement with that by the corresponding experiment.

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

Fig.2: Time evolution of pressure at a monitoring position in the combustion chamber.

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: 120 Hour(s)

JSS3 Resources Used

Fraction of Usage in Total Resources*1(%): 1.31

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	35673471.92	1.56
TOKI-ST	48200.33	0.05
TOKI-GP	0.00	0.00
TOKI-XM	0.00	0.00
TOKI-LM	2246.29	0.15
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	246.15	0.22
/data and /data2	23517.33	0.18
/ssd	99.17	0.01

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)	0.00	0.00

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