High-speed rotorcrafts technology training
JAXA Supercomputer System Annual Report February 2021-January 2022
Report Number: R21ETET04
Subject Category: Skills Acquisition System
- Responsible Representative: Yoshikazu Makino, Aeronautical Technology Directorate, Silent Supersonic Aircraft Team
- Contact Information: Takumi YUMINO(t-yumino@st.go.tuat.ac.jp)
- Members: Hideaki Sugawara, Yasutada Tanabe, Takumi Yumino
Abstract
Analysis of Aerodynamic Performance of a Coaxial Rotor in High-Speed Forward Flight
Reference URL
N/A
Reasons and benefits of using JAXA Supercomputer System
In order to perform a rotorcraft analysis tool.
Achievements of the Year
Numerical analysis of a coaxial rotor for a next-generation rotorcraft was conducted. The numerical analysis was performed using rFlow3D developed at JAXA. Moving overlapped grids are utilized to simulate the motions of the main rotor blades. Figure 1 shows the computational grid in the present calculation.
In the present calculations, the vibration characteristics of an isolated coaxial rotor system under the advance ratio of 0.7 and 0.8 is investigated. Figure 2 shows an example of calculation result. The difference in the aerodynamic vibration mechanism depending on the number of blades per rotor is clarified through the numerical simulations. Further vibration reduction method are also investigated.
Fig.1: Computational grid used in the simulations
Fig.2: Sample result for the coaxial rotor system
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: 170 Hour(s)
JSS3 Resources Used
Fraction of Usage in Total Resources*1(%): 0.16
Details
Please refer to System Configuration of JSS3 for the system configuration and major specifications of JSS3.
| System Name | CPU Resources Used(Core x Hours) | Fraction of Usage*2(%) |
|---|---|---|
| TOKI-SORA | 571.25 | 0.00 |
| TOKI-ST | 1097066.81 | 1.35 |
| 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 Name | Storage Assigned(GiB) | Fraction of Usage*2(%) |
|---|---|---|
| /home | 539.18 | 0.54 |
| /data and /data2 | 33814.51 | 0.36 |
| /ssd | 5520.99 | 1.43 |
| Archiver Name | Storage Used(TiB) | Fraction of Usage*2(%) |
|---|---|---|
| J-SPACE | 0.00 | 0.00 |
*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 Used(Hours) | Fraction of Usage*2(%) | |
|---|---|---|
| ISV Software Licenses(Total) | 487.70 | 0.34 |
*2: Fraction of Usage：Percentage of usage relative to each resource used in one year.
JAXA Supercomputer System Annual Report February 2021-January 2022