Cooperative Research on Landing Gear in the FQUROH Project
JAXA Supercomputer System Annual Report April 2016-March 2017
Report Number: R16E0030
- Responsible Representative: Kazuomi Yamamoto(FQUROH Project Team (Flight Demonstration of Quiet Technology to Reduce Noise from High-Lift Configurations Project Team), Aeronautical Technology Directorate)
- Contact Information: Yasushi Ito(ito.yasushi@jaxa.jp)
- Members: Kazuomi Yamamoto, Yasushi Ito, Mitsuhiro Murayama, Ryotaro Sakai, Takeshi Inoue, Hunghuei Lee
- Subject Category: Aviation(Aircraft,Body sound)
Abstract
This collaborative research is being carried out as part of the FQUROH project aimed at raising the technical maturity level of the noise reduction technology for landing gear, which draws international attention to reduce noise in areas around airports, to a level applicable to future development of aircraft and related equipment. This contributes to reduction of aircraft noise in local communities around the airport and airline operating costs by reducing landing fee.
Goal
Objective
References and Links
Use of the Supercomputer
The JSS2 enabled low-noise devices to be designed based on Reynolds-averaged Navier-Stokes simulations and more advanced computational simulations, such as large eddy Simulations.
Necessity of the Supercomputer
Computational simulations using the JSS2 made it possible to design low-noise devices by understanding detailed physical phenomena, which was difficult only with wind tunnel tests.
Achievements of the Year
Computational simulations were conducted to estimate time required for cooling down the main landing gear of the JAXA’s experimental aircraft, ‘Hisho,’ with and without low-noise devices, and it was turned out that they did not significantly affect brake cooling time.

Fig.1:Temperature distributions on a vorticity contour surface and flow velocity distributions on a cross-section across the tire in an early stage of cooling down the main landing gear of Hisho under a no-wind landing condition.
Publications
Non peer-reviewed articles
1) Yamamoto, K., Hayama, K., Kumada, T. and Hayashi, K., ‘FQUROH: A Flight Demonstration Project for Airframe Noise Reduction Technology – Concept and Current Status,’ 22nd AIAA/CEAS Aeroacoustics Conference, Lyon, France, No. AIAA-2016-2709, 2016, DOI: 10.2514/6.2016-2709.
Computational Information
- Parallelization Methods: Process Parallelization
- Process Parallelization Methods: MPI
- Thread Parallelization Methods: n/a
- Number of Processes: 25
- Number of Threads per Process: 1
- Number of Nodes Used: 3
- Elapsed Time per Case (Hours): 12
- Number of Cases: 8
Resources Used
Total Amount of Virtual Cost(Yen): 2,928,277
Breakdown List by Resources
System Name | Amount of Core Time(core x hours) | Virtual Cost(Yen) |
---|---|---|
SORA-MA | 0.00 | 0 |
SORA-PP | 306,416.27 | 2,616,182 |
SORA-LM | 0.00 | 0 |
SORA-TPP | 0.00 | 0 |
File System Name | Storage assigned(GiB) | Virtual Cost(Yen) |
---|---|---|
/home | 52.07 | 368 |
/data | 6,794.46 | 48,069 |
/ltmp | 4,754.93 | 33,640 |
Archiving System Name | Storage used(TiB) | Virtual Cost(Yen) |
---|---|---|
J-SPACE | 99.34 | 230,017 |
Note: Virtual Cost=amount of cost, using the unit price list of JAXA Facility Utilization program(2016)
JAXA Supercomputer System Annual Report April 2016-March 2017