JAXA Supercomputer System Annual Report April 2017-March 2018

Report Number: R17EA2740

Subject Category: Aeronautical Technology

PDF available here

• Responsible Representative: Toshio Nishizawa, Aeronautical Technology Directorate, aFJR project team
• Contact Information: Shunji ENOMOTO enomoto.shunji@jaxa.jp
• Members: Shunji ENOMOTO, Tatsuya ISHII, Daisuke Sasaki, Hidemi Toh, Tsubasa Iwafune, Yusuke Akamisaka, Takuma Kanda, Ryo Inagaki, Hitoshi Morita

Abstract

The purpose of aFJR project is to advance research on jet engine component technologies so that Japanese manufacturers can join more effectively in international joint-development projects on next-generation jet engines. To compensate for increasing fan diameter, we are developing lightweight fan blades that have higher aerodynamic efficiency by applying advanced simulation technology and composite materials evaluation technology.

For the development of lightweight sound absorbing liner technology, we developed a technology to simulate sound waves absorbed by sound absorbing liners and devise a shape with higher absorption rate.

Reference URL

Please refer to 'aFJR (Advanced Fan Jet Research) project | ECAT - Environment-Conscious Aircraft Technology Program | Aeronautical Technology Directorate'.

Reasons for using JSS2

The calculation is LES with a large amount of computation and storage usage. It was necessary to use SORA-PP, TPP, and SORA-FS.

Achievements of the Year

Numerical simulation method of sound absorbing liner with glazing flow was studied by using UPACS-LES which is an analytical code with less attenuation of sound waves using a 6th order compact scheme. Two-dimensional laminar flow was assumed for calculation. Fig. 1 shows the sound pressure. Sound waves propagating from the left to the right in the figure are absorbed by sound absorbing cells installed at the lower center of the figure.

Fig.1(video): Sound pressure

Publications

■ Presentations

1) Shunji ENOMOTO, Tatsuya Ishii, Yusuke Akamisaka, Hidemi Toh, "Numerical analysis of sound absorbing liner with glazing flow", 50th Fluid Dynamics Conference / 35th Aerospace Numerical Simulation Symposium, 2018

Usage of JSS2

Computational Information

• Process Parallelization Methods: MPI
• Thread Parallelization Methods: N/A
• Number of Processes: 12 - 24
• Elapsed Time per Case: 40.00 hours

Resources Used

Fraction of Usage in Total Resources*1(%): 0.24

Details

Please refer to System Configuration of JSS2 for the system configuration and major specifications of JSS2.

*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.

JAXA Supercomputer System Annual Report April 2017-March 2018