Aerodynamics and Acoustics Simulations for Multiple Rotors

JAXA Supercomputer System Annual Report February 2025-January 2026

Report Number: R25EDA201E10

Subject Category: Aeronautical Technology

Responsible Representative: Kanako Yasue, Aviation Technology Directorate, Aviation Integration Innovation Hub
Contact Information: Hideaki Sugawara(sugawara.hideaki@jaxa.jp)
Members: Isao Aozasa, Takuto Ohyama, Yuta Ozawa, Hideaki Sugawara, Hiroki Ura, Kanako Yasue

Abstract

This study investigates the improvement of aerodynamic performance and noise reduction in multirotor systems. Numerical simulations and wind tunnel experiments are conducted to investigate the fundamental mechanisms of aerodynamic interferences among multiple rotors and to characterize their acoustic behavior. The objective is to develop advanced performance prediction and design methodologies for multi-rotor systems.

Reference URL

N/A

Reasons and benefits of using JAXA Supercomputer System

Accurate resolution of vortical flow around a rotor requires large-scale computational grids and therefore necessitates the use of high-performance computing resources such as supercomputers.

Achievements of the Year

Wind tunnel tests were conducted to provide reference data for investigating aerodynamic interactions between multiple rotors. Pre-test CFD analyses were performed, and the results were used to design and refine the test plan. Extensive numerical analyses were carried out to support and optimize the test planning process.

Publications

N/A

Usage of JSS

Computational Information

Process Parallelization Methods: N/A
Thread Parallelization Methods: OpenMP
Number of Processes: 1
Elapsed Time per Case: 336 Hour(s)

JSS3 Resources Used

Fraction of Usage in Total Resources*1(%): 0.49

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	0.00	0.00
TOKI-ST	4307362.39	4.46
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	0.00	0.00
/data and /data2	102400.00	0.67
/ssd	0.00	0.00

Archiver Resources
Archiver Name	Storage Used (TiB)	Fraction of Usage*2(%)
J-SPACE	5.41	0.02

*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.