Numerical Study on Combustible Flow in Supersonic Flight Engines and Rocket Engines

JAXA Supercomputer System Annual Report April 2019-March 2020

Report Number: R19EACA01

Subject Category: JSS2 Inter-University Research

Responsible Representative: Nobuyuki Tsuboi, Professor, Department of Mechanical and Control Engineering, Kyushu Institute of Technology
Contact Information: Nobuyuki Tsuboi(tsuboi@mech.kyutech.ac.jp)
Members: Nobuyuki Tsuboi, Kouhei Ozawa, Takahide Araki, Toshihiro Iwasa, Nicolas H. Jourdaine, Shota Goto, Kodai Shimomura, Takuro Yoshino, Tomohiro Watanabe, Taishi Amano, Kanta Iwasaki, Nobuhiro Kurita, Naomi Takeshima, Darshan Manjunath

Abstract

Fundamental studies on nozzles and combustors for Japanese rocket engines and supersonic engines are performed by using numerical simulations.

Reference URL

Please refer to ‘反応流体力学研究室/研究テーマ‘.

Reasons and benefits of using JAXA Supercomputer System

Academic and applicative researches on fluid dynamics and combustion mechanism, and development of effective numerical methods are carried out in order to develop Japanese rocket engines and supersonic engines.

Achievements of the Year

To validate the analysis code for the jet mixing in the supersonic crossflow, LES/RANS hybrid simulation on the round helium jet is performed. As a result, the shock waves and vortex structure near the jet exit are observed, as shown in Fig. 1. We confirmed that the analysis code can simulate the jet mixing in the time-averaged flow-field, as shown in Fig. 2.

Fig.1: Time-averaged Mach number distribution with streamline.

Fig.2: Time-averaged Helium mass fraction distribution.

Publications

– Oral Presentations

[1]Toshihiro Iwasa, Nobuyuki Tsuboi, “Mixing characteristics of the slit-shaped hydrogen jet in supersonic crossflow”, 32nd International Symposium on Shock Waves, OR-21-0357, Singapore, July, 2019.

Usage of JSS2

Computational Information

Process Parallelization Methods: MPI
Thread Parallelization Methods: OpenMP
Number of Processes: 8 – 12
Elapsed Time per Case: 360 Hour(s)

Resources Used

Fraction of Usage in Total Resources*1(%): 0.05

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	366,280.03	0.04
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	104.90	0.09
/data	1,049.04	0.02
/ltmp	21,484.38	1.83

Archiver Resources
Archiver Name	Storage Used (TiB)	Fraction of Usage*2(%)
J-SPACE	0.00	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.