Numerical analysis for optimal design of helicopter rotor blades
JAXA Supercomputer System Annual Report February 2023-January 2024
Report Number: R23EDA201C22
Subject Category: Aeronautical Technology
- Responsible Representative: Kanako Yasue, Aviation Technology Directorate, team leader, Aircraft Life-cycle Innovation Hub, Airmobility Digital Design Team
- Contact Information: Keita Kimura(kimura.keita@jaxa.jp)
- Members: Fumihiro Kajiwara, Keita Kimura, Masahiko Sugiura, Hideaki Sugawara, Yasutada Tanabe
Abstract
JAXA, DLR, and ONERA are collaborating on research as to blade optimization under various flight conditions for the purpose of validating and accumulating knowledge on the helicopter blade analysis tools and optimization methods owned by the three institutions. This fiscal year, acoustic analysis has been conducted based on the pressure distribution obtained from CFD analysis under helicopter descent flight conditions, and optimization for blades with quieter noise level has been progressed. In acoustic analysis of helicopters, it is crucial to accurately resolve tip vortices generated by the blades, demanding high-resolution fluid analysis. This report will present some examples of results.
Reference URL
N/A
Reasons and benefits of using JAXA Supercomputer System
In CFD-based optimization, a large number of cases with several design variables need to be performed in the CFD analysis, and the use of a supercomputer is essential; DLR/ONERA is conducting a similar HPC-based optimization, and comparison and study using results obtained using a supercomputer is appropriate.
Achievements of the Year
In a collaborative effort among JAXA, DLR, and ONERA, a common optimization problem for helicopter descent flight has been established, and shape optimization using CFD has been pursued. The initial step involved conducting acoustic analysis on the baseline HART II blade and comparing the analysis results from each organization. Subsequently, optimization of the blade shape is going to be carried out.
Figure 1 illustrates the CFD results under a descent flight condition. It is known that significant noise occurs when the tip vortices generated by the rotor blades interfere with another blade (Blade Vortex Interaction).
Figure 2 shows an example of acquiring the noise carpet on the under of the rotor plane using the pressure distribution on the blade surfaces obtained by CFD, calculated by the FWH method. It can be observed that the noise generated by the rotor blades significantly varies depending on the azimuth angle.
Publications
– Oral Presentations
J. Bailly, G. Wilke, K. Kimura , Y. Tanabe, “JAXA-ONERA-DLR COOPERATION: RESULTS FROM MULTI-POINT AERODYNAMIC OPTIMIZATION OF A ROTOR IN HOVER AND FORWARD FLIGHT,” 49th European Rotorcraft Forum, Buckeburg, Germany, 2023.
Usage of JSS
Computational Information
- Process Parallelization Methods: N/A
- Thread Parallelization Methods: OpenMP
- Number of Processes: 1
- Elapsed Time per Case: 100 Hour(s)
JSS3 Resources Used
Fraction of Usage in Total Resources*1(%): 0.08
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 | 544252.68 | 0.02 |
TOKI-ST | 508656.60 | 0.55 |
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 | 1118.98 | 0.93 |
/data and /data2 | 115685.73 | 0.71 |
/ssd | 31306.95 | 2.96 |
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) | 0.00 | 0.00 |
*2: Fraction of Usage:Percentage of usage relative to each resource used in one year.
JAXA Supercomputer System Annual Report February 2023-January 2024