Development of CFD technology to support design of aircraft combustor with real configuration.

JAXA Supercomputer System Annual Report April 2019-March 2020

Report Number: R19EA2117

Subject Category: Aeronautical Technology

Responsible Representative: Mitsumasa Makida(JAXA, Aeronautical Technology Directorate)
Contact Information: Mitsumasa Makida(Aeronautical Technology Directorate)(makida.mitsumasa@jaxa.jp)
Members: Mitsumasa Makida, Naoki Nakamura

Abstract

In this research, we aim to obtain design methods for development of aircraft combustors with real configuration, which estimate dispersion of the fuel droplets, evaporation, and combustion processes.

Reference URL

N/A

Reasons and benefits of using JAXA Supercomputer System

It is important to do parametric case study with slightly different geometry, and each case with spray and combustion needs large scale simulation. To conduct such simulation and visualization effectively, we use the super computer with high parallelization efficiency.

Achievements of the Year

In this fiscal year, we added chemical reaction models into the base solver, which enabled to simulate the distribution of fuel spray, fuel vapor and chemical reaction rate near the fuel nozzle with realistically complicated configuration.Fig.1 shows calculation grids around the fuel nozzle, and as examples of calculation result, Fig.2 shows contour of fuel gas mass fraction and gas temperature.

Fig.1: Calculation grids around fuel nozzle

Fig.2: Contour of fuel gas mass fraction and gas temperature.

Publications

N/A

Usage of JSS2

Computational Information

Process Parallelization Methods: MPI
Thread Parallelization Methods: Automatic Parallelization
Number of Processes: 120
Elapsed Time per Case: 300 Hour(s)

Resources Used

Fraction of Usage in Total Resources*1(%): 0.20

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	1,722,316.00	0.21
SORA-PP	4,938.16	0.03
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	182.16	0.15
/data	14,019.68	0.24
/ltmp	2,736.70	0.23

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.