JAXA Supercomputer System Annual Report (April 2018-March 2019)

Cooperative Research on High Lift Devices in the FQUROH Project
Report Number: R18EA2810
Subject Category: Aeronautical Technology
URL: https://www.jss.jaxa.jp/en/ar/e2018/9080/
Responsible Representative
Kazuomi Yamamoto, FQUROH Project Team, Aeronautical Technology Directorate
Contact Information
Kazuomi Yamamoto (yamamoto.kazuomi@jaxa.jp)
Members
Akio Ochi, Kazuhide Isotani, Yousuke Ueno, Hidemasa Yasuda, Yuta Tsuchimoto, Kazuomi Yamamoto, Yasushi
Ito, Mitsuhiro Murayama, Ryotaro Sakai
Abstract
This collaborative research is being carried out as part of the FQUROH project aimed at raising the technicalmaturity level of the noise reduction technology for high-lift devices and landing gear, which draws international
attention to reduce noise in areas around airports, to a level applicable to future development of aircraft and relatedequipment. This contributes to reduction of aircraft noise in local communities around the airport and airline
operating costs by reducing landing fee.
Ref. URL: http://www.aero.jaxa.jp/eng/research/ecat/fquroh/
Reasons for using JSS2
The JSS2 enabled low-noise devices to be designed based on Reynolds-averaged Navier-Stokes simulations andmore advanced computational simulations, such as large eddy simulations, using the Kawasaki Heavy Industries(KHI)-developed unsteady computational fluid dynamics software, “Cflow.” Computational simulations using theJSS2 made it possible to design low-noise devices by understanding detailed physical phenomena, which wasdifficult only with wind tunnel tests.
Achievements of the YearAs a validation of the noise reduction design of the main landing gear (MLG) of JAXA’s jet research aircraft,“Hisho,” in the FQUROH project, CFD simulations of the MLG were conducted using the KHI in-house unsteady
CFD software, “Cflow.” Computational results were compared with wind tunnel and flight test results, and detailed
knowledge of noise generation and reduction mechanisms were obtained.

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This document is provided by JAXA.

JAXA Special Publication JAXA-SP-19-003E

Fig. 1: Unsteady CFD analysis around main landing gear of “Hisho”(instantaneous Mach number distribution)

Publications- Non peer-reviewed papers
1) Yamamoto, K., Takaishi, T., Murayama, M., Yokokawa, Y., Ito, Y., Kohzai, M., Arizono, H., Sakai, R., Shoji,H., Ueno, Y., Tsuchimoto, Y., Isotani, K., Hayama, K., Kumada, T., and Shimada, A., “FQUROH: A Flight
Demonstration Project for Airframe Noise Reduction Technology - the 2nd Flight Demonstration,” AIAA Paper
2018-4087, 2018 AIAA/CEAS Aeroacoustics Conference, Atlanta, GA, June 2018, DOI:10.2514/6.2018-4087.
2) Murayama, M., Yokokawa, Y., Ito, Y., Takaishi, T., Sakai, R., Yamamoto, K., Ueno, Y., Isotani, K.,Tsuchimoto, Y., Hayama, K., Hirai, T., and Tanaka, K., “Noise Reduction Design for Flap Side-edges toward
FQUROH Second Flight Demonstration,” AIAA Paper 2018-4085, 2018 AIAA/CEAS Aeroacoustics Conference,Atlanta, GA, June 2018, DOI:10.2514/6.2018-4085.
3) Ueno, Y., Isotani, K., Hayama, K., Takaishi, T., Ito, Y., Yokokawa, Y., Murayama, M., and Yamamoto, K.,“Validation of Noise Reduction Design for Landing Gear in the FQUROH Flight Demonstration Project,” 25thAIAA/CEAS Aeroacoustics Conference, Delft, The Netherlands, May 2019, to be presented.

－30－This document is provided by JAXA.

JAXA Supercomputer System Annual Report (April 2018-March 2019)

Usage of JSS2

Computational Information
Process Parallelization Methods

MPI

Thread Parallelization Methods

N/A

Number of Processes

2048 - 8192

Elapsed Time per Case

240 Hour (s)Resources Used
Fraction of Usage in Total Resources*1 (%): 0.53
Details
Computational Resources
System Name

Amount of Core Time(core x hours)

Fraction of Usage*2 (%)

SORA-MA

4,783,274.10

0.59

SORA-PP

0.00

0.00

SORA-LM

0.00

0.00

SORA-TPP

0.00

0.00

File System Resources
File System Name

Storage Assigned (GiB)

Fraction of Usage*2 (%)/home79.76

0.08/data

13,699.25

0.24

/ltmp

7,446.29

0.64

Archiver Resources
Archiver Name

Storage Used (TiB)

J-SPACE

Fraction of Usage*2 (%)
112.24

3.93*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.

－31－This document is provided by JAXA.