Aerodynamic analysis for high-speed rotorcraft

JAXA Supercomputer System Annual Report February 2024-January 2025

Report Number: R24EDA201C20

Subject Category: Aeronautical Technology

Responsible Representative: Kanako Yasue, Aviation Technology Directorate, Aviation Integration Innovation Hub
Contact Information: Hideaki Sugawara(sugawara.hideaki@jaxa.jp)
Members: Fumihiro Kajiwara, Yuki Kishi, Keita Kimura, Hideaki Sugawara, Ryo Takahashi, Yasutada Tanabe, Kanako Yasue

Abstract

This project aims to contribute to improvement in the flight range and flight speed of rotorcraft , and is conducting research and development for technologies to reduce aerodynamic drag. Rotorcraft consists of non-streamlined parts such as rotor hub, and it is necessary to reduce the drag of these parts. The purpose of this study is the development of drag reduction device to improve the aerodynamic performance of rotorcraft.

Reference URL

N/A

Reasons and benefits of using JAXA Supercomputer System

For the larges-scale analysis and complex flow field analysis, it is necessary to perform efficient analysis using JAXA supercomputer.

Achievements of the Year

The analysis of complex helicopter fuselage is carried out using FaSTAR, an unstructured grid solver developed at JAXA. Based on the numerical results, the drag is broken down for each component, and high drag components are identified. CFD analysis is used to evaluate the results of a design to reduce drag for high drag components. In addition, the optimal design of the rotor blades using CFD analysis (rotorcraft CFD tool, rFlow3D) are performed. The optimal blade is achieved the high performance than existing blades.

Publications

N/A

Usage of JSS

Computational Information

Process Parallelization Methods: MPI
Thread Parallelization Methods: OpenMP
Number of Processes: 480 - 1920
Elapsed Time per Case: 336 Hour(s)

JSS3 Resources Used

Fraction of Usage in Total Resources*1(%): 1.49

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	21607018.59	0.99
TOKI-ST	3821949.60	3.92
TOKI-GP	0.00	0.00
TOKI-XM	0.00	0.00
TOKI-LM	123.09	0.01
TOKI-TST	2290546.98	41.14
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	218.28	0.15
/data and /data2	123256.85	0.59
/ssd	604.42	0.03

Archiver Resources
Archiver Name	Storage Used (TiB)	Fraction of Usage*2(%)
J-SPACE	7.01	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)	701.06	0.48

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