Aerodynamic evaluation of an annular plug inside a flow-through nacelle of an aircraft model.

JAXA Supercomputer System Annual Report February 2021-January 2022

Report Number: R21EDA201N05

Subject Category: Aeronautical Technology

Responsible Representative: Takashi Aoyama, Aeronautical Technology Directorate, Aircraft Lifecycle Innovation Hub
Contact Information: Makoto Ueno, Aviation Technology Directorate, Aircraft Lifecycle Innovation Hub(ueno.makoto@jaxa.jp)
Members: Chigusa Hamada, Kenji Hayashi, Takashi Ishida, Fumitake Kuroda, Masaru Naruoka, Hiroya Toriida, Makoto Ueno, Takahiro Uchiyama, Yuko Ueno, Kento Yamada, Takahiro Yamamoto

Abstract

The air flow rate in the engine nacelle is adjusted using annular plugs placed in the nacelle to evaluate the effect of the air flow rate in the engine nacelle on the aerodynamic characteristics of the aircraft.

Reference URL

N/A

Reasons and benefits of using JAXA Supercomputer System

It is necessary to perform CFD computation including flow around a whole aircraft because it requires highly parallelized computation. Additionally, the JSS2 was chosen because the FaSTAR CFD solver is optimized, as well.

Achievements of the Year

Flowfields around the wind tunnel testing model for detailed aerodynamic modeling with and without an annular plug inside a flow-through nacelle were obtained using FaSTAR.

Fig.1: Limiting streamlines inside a flow-through nacelle without an annular plug (Mach 0.8, AoA 3deg)

Fig.2: Limiting streamlines inside a flow-through nacelle with an annular plug (Mach 0.8, AoA 3deg)

Publications

N/A

Usage of JSS

Computational Information

Process Parallelization Methods: MPI
Thread Parallelization Methods: N/A
Number of Processes: 25
Elapsed Time per Case: 12.5 Hour(s)

JSS3 Resources Used

Fraction of Usage in Total Resources*1(%): 2.77

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	65869676.35	3.20
TOKI-ST	5701.32	0.01
TOKI-GP	0.00	0.00
TOKI-XM	0.00	0.00
TOKI-LM	0.00	0.00
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	752.15	0.75
/data and /data2	131318.39	1.40
/ssd	398.89	0.10

Archiver Resources
Archiver Name	Storage Used (TiB)	Fraction of Usage*2(%)
J-SPACE	71.32	0.48

*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)	21.20	0.01

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