Study of high speed fluid

JAXA Supercomputer System Annual Report April 2017-March 2018

Report Number: R17EU0902

Subject Category: Space and Astronautical Science

Responsible Representative: Eiichi Sato, Institute of Space and Astronautical Science
Contact Information: Akira Oyama oyama.akira@jaxa.jp
Members: Akira Oyama, Dong Lee, Hiroaki Fukumoto, Takuya Harada, Hiroaki Nakano, Takara Watanabe, Shota Inoue, Risako Aoki, Shigetaka Kawai, Satoshi Sekimoto, Shun Tamura, Srikanth Surendranath, Daiki Terakado, Yuta Ozawa, Satoshi Shimomura, Taku Nonomura

Abstract

We conduct fundamental research on aerodynamics such as aerodynamic acoustic noise generated by supersonic jet and aerodynamic design of Mars aircraft.

Reference URL

N/A

Reasons for using JSS2

Large eddy simulation is required for analysis of aeroacoustics generated from a supersonic jet. Aerodynamic design of Mars airplane requires several hundred cases of CFD computation. Therefore, a supercomputer is necessary.

Achievements of the Year

Aerodynamic airfoil design optimization of flying-wing-type Mars airplane has been conducted. The result show that there is a tradeoff between maximizing lift to drag ratio and improving stability performance. A guideline for airfoil shape design has been also obtained. We also conducted uncertainty quantification of aerodynamic performance of an airfoil in low Reynolds number flow condition.

Fig.1: Aerodynamic airfoil design optimization of flying-type Mars airplane

Fig.2: Uncertainty quantification of airfoil performance in low Reynolds number flow

Publications

■ Non peer-reviewed papers

1) Takuya Harada, Koji Fujita, Akira Oyama, Hiroya Mamori, Makoto Yamamoto, Aerodynamic Design of Airfoil for Flying Wing Mars Airplane,

AIAA Scitech, Kissimmee, FL, US, Jan 8-12. 2018

2) Shigetaka Kawai, Thijs Bouwhuis, Yoshiaki Abe, Aiko Yakeno, Taku Nonomura, Akira Oyama, Harry Hoeijmakers, and Kozo Fujii, Investigation of Maximum Velocity Induced by Body-Force Fields for Simpler Modeling of Plasma Actuators, AIAA Aerospace Sciences Meeting, AIAA Science and Technology Forum and Exposition 2018, Kissimmee, FL, US, Jan 8-12. 2018

3) Hiroaki Fukumoto, Hikaru Aono, Taku Nonomura, Akira Oyama and Kozo Fujii, Large-Eddy Simulations of Flow Control Effects of a DBD Plasma Actuator at Various Burst Frequencies on a Dynamic Floweld around a Pitching NACA0012 Airfoil at Reynolds Number of 256,000, AIAA Aerospace Sciences Meeting, AIAA Science and Technology Forum and Exposition 2018, Kissimmee, FL, US, Jan 8-12. 2018.

Usage of JSS2

Computational Information

Process Parallelization Methods: parametric study.
Thread Parallelization Methods: OpenMP
Number of Processes: 52
Elapsed Time per Case: 16.00 hours

Resources Used

Fraction of Usage in Total Resources*1(%): 1.83

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	14,918,585.64	1.97
SORA-PP	1,596.63	0.02
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	3,621.92	2.51
/data	86,487.83	1.60
/ltmp	18,013.20	1.36

Archiver Resources
Archiver Name	Storage Used (TiB)	Fraction of Usage*2(%)
J-SPACE	3.98	0.17

*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.