JAXA Supercomputer System Annual Report April 2018-March 2019

Report Number: R18EA3304

Subject Category: Aeronautical Technology

PDF available here

• Responsible Representative: Yasutada Tanabe, Senior Researcher, Aeronautical Technology Directorate, Aviation Systems Unit
• Contact Information: Yasutada Tanabe, Aviation Systems Unit, Aeronautical Technology Directorate(tan@chofu.jaxa.jp)
• Members: Yasutada Tanabe, Hideaki Sugawara, Masahiko Sugiura

Abstract

Aiming to achieve a flight speed as high as twice of the conventional helicopters, a new concept of compound helicopter is proposed. Key technologies such the system integration, remarkable reduction of the aerodynamic drag and optimized rotor design are investigated.

Reference URL

N/A

Reasons for using JSS2

The newly proposed compound helicopter utilizes 4 rotor/propellers. CFD analysis involving the whole aircraft requires large amount of memories and long-time computations. Super-computers such as the JSS2 is a must infrastructure for this kind of research.

Achievements of the Year

Wind-tunnel testing using the conceptual model of the proposed compound helicopter is carried out and basic aerodynamic data are obtained which will be used to validate the CFD analysis results. Also, rotor/wing interactions which contribute to a large amount of the aerodynamc drag of the whole aircraft are simulated and the drag increases due to the interaction are collected. The rotor optimization for high-speed flight is also underway. A photo of the concetual model during wind-tunnel testing is shown in Fig. 1, and a sample of CFD simulation for the whole aircraft configuration is shown in Fig. 2.

Fig.1: Photo of the concetual model during wind-tunnel testing

Fig.2: A sample of the CFD simulation for a full-configuration of the conceptual model

Publications

– Non peer-reviewed papers

1) Yasutada Tanabe, Masahiko Sugiura, Noboru Kobiki and Hideaki Sugawara, A New Concept of Compound Helicopter and Flight Tests, 2018 Asia Pacific International Symposium on Aerospace Technology, Chengdu, China, Oct 16-18, 2018.

2) Hideaki Sugawara, Yasutada Tanabe, Noriaki Itoga, Masaharu Kameda, Numerical Simulation of AerodynamicInteraction Between a Rotor and a Wing, 7th Asian/Australian Rotorcraft Forum, Jeju Island, Korea, Oct 30 – Nov 1, 2018.

Usage of JSS2

Computational Information

• Process Parallelization Methods: N/A
• Thread Parallelization Methods: OpenMP
• Number of Processes: 1
• Elapsed Time per Case: 240 Hour(s)

Resources Used

Fraction of Usage in Total Resources*1(%): 0.77

Details

Please refer to System Configuration of JSS2 for the system configuration and major specifications of JSS2.

*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.

JAXA Supercomputer System Annual Report April 2018-March 2019