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

Please refer 'FQUROH (Flight Demonstration of Quiet Technology to Reduce Noise from High-lift Configurations) project | ECAT - Environment-Conscious Aircraft Technology Program | Aeronautical Technology Directorate'.

Objective

Please refer 'FQUROH (Flight Demonstration of Quiet Technology to Reduce Noise from High-lift Configurations) project | ECAT - Environment-Conscious Aircraft Technology Program | Aeronautical Technology Directorate'.

References and Links

Please refer 'FQUROH (Flight Demonstration of Quiet Technology to Reduce Noise from High-lift Configurations) project | ECAT - Environment-Conscious Aircraft Technology Program | Aeronautical Technology Directorate'.

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

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