Basic research for system integration of silent supersonic airplane
JAXA Supercomputer System Annual Report February 2022-January 2023
Report Number: R22ETET01
Subject Category: Skills Acquisition System
- Responsible Representative: Yoshikazu Makino, Aviation Technology Directorate, Silence Supersonic Aircraft Team
- Contact Information: Hiroaki Ishikawa(ishikawa.hiroaki2@jaxa.jp)
- Members: Hiroaki Ishikawa, Issei Kikura, Yoshikazu Makino, Takuma Tsuda, Taiga Ueno
Abstract
The system integration design technologies for achieving low sonic-boom, low aerodynamic drag, low landing and take-off noise, and light weight simultaneously are the key technologies for future supersonic airplanes. JAXA is promoting the R&D for these technologies based on our experiences of demonstrating the advanced low-drag and low-boom design concepts.
Reference URL
Please refer to http://www.aero.jaxa.jp/eng/research/frontier/sst/ .
Reasons and benefits of using JAXA Supercomputer System
To achieve low sonic-boom, low aerodynamic drag, low landing and take-off noise, and light weight simultaneously, the multi-objective optimization tools are utilized in the design study. A supercomputer is necessary to efficiently evaluate these multiple evaluations.
Achievements of the Year
Trim improvement by canards has been considered in the design of low-boom supersonic aircraft. However, the shock wave from the canard itself degrades the its low-boom performance. In this study, effective canard geometry for both low boom performance and trim performance were investigated by examining the canard area required for trimmed flight and its low-boom performance. The canard area was determined and the near-field pressure signature was estimated by CFD calculation by using FaSTAR (Fig. 1), and the near-field pressure signatre was modified by Multipole Analysis by using MPnoise. Then, acoustic propagation analysis by using Xnoise was performed on the modified near-field pressure signature to estimate the sonic boom on the ground. As a result, it was confirmed that the ground pressure signature was improved by the canard geometry and appropriate low-boom fuselage design that cancels the shock wave (Figure 2), thus reducing sonic boom strength compared to the original geometry. The trade-off relationship between canard area and low-boom performance due to canard geometry was also clarified.
Publications
N/A
Usage of JSS
Computational Information
- Process Parallelization Methods: MPI
- Thread Parallelization Methods: Automatic Parallelization
- Number of Processes: 384 – 1024
- Elapsed Time per Case: 13 Hour(s)
JSS3 Resources Used
Fraction of Usage in Total Resources*1(%): 0.26
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 | 6190385.72 | 0.27 |
TOKI-ST | 143264.77 | 0.14 |
TOKI-GP | 0.00 | 0.00 |
TOKI-XM | 0.00 | 0.00 |
TOKI-LM | 2078.47 | 0.14 |
TOKI-TST | 1.06 | 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 | 1006.67 | 0.91 |
/data and /data2 | 68956.67 | 0.53 |
/ssd | 10306.67 | 1.43 |
Archiver Name | Storage Used(TiB) | Fraction of Usage*2(%) |
---|---|---|
J-SPACE | 0.65 | 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) | 3041.83 | 2.12 |
*2: Fraction of Usage:Percentage of usage relative to each resource used in one year.
JAXA Supercomputer System Annual Report February 2022-January 2023