JAXA Supercomputer System Annual Report April 2020-March 2021

Report Number: R20EDA201P73

Subject Category: Aeronautical Technology

PDF available here

• Responsible Representative: Keiichi OKAI, Assoiciate Senior Researcher, Aeronautical Technology Directorate, Aeroengine Technology Demonstration Section
• Contact Information: Keiichi OKAI(okai.keiichi@jaxa.jp)
• Members: Keiichi Okai, Junichi Kazawa, Akiyoshi Masaki

Abstract

In this study, evaluation of unsteady aerodynamics in aircraft fan under strongly distorted inflow condition simulating airframe/engine integration configuration with Boundary Layer Ingestion (BLI) benefit suited for future electric aircraft. Under these BLI conditions, aircraft fan suffers almost all the flight path strongly distorted inflow conditions, the present study investigates the fan flows in detail through the numerical simulations.

Reference URL

N/A

Reasons and benefits of using JAXA Supercomputer System

The srudy deals with fan aerodynamic flows under inlet conditions of asymmetric distorsion inflow. For the purpose, high-resolution and full-annula duct flow analysis is necessary with the use of JSS2 supercomputer.

Achievements of the Year

Fan rotor unsteady aerodynamic flow analysis was conducted under the inflow distortion condition simulating airframe/engine integration configuration suited for future electric aircraft. Figure 1 shows entropy distribution at 96% span under non-distorted condition (upper side) and BLI condition (lower side). The figure indicates entropy increases remarkably in distorted region. Figure 2 comperes flow velocity under these two conditions and a reversed flow region was observed at tip side under BLI condition (lower side).

Fig.1: Entropy distribution at 96% span

Fig.2: Velocity distribution at tip side

Publications

- Oral Presentations

Masaki, A., Ogushi, S., Tsuruta, R., Nishiwaki, D., Sato, T., Okai, K., Kazawa, J., Masaki, D., Harada, M., Assessment of the Influence of Boundary Layer Ingestion (BLI) on the Axial Fan, ISROMAC2019-00113, 18th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery (ISROMAC18), Virtual meeting, November 25th 2020.

Usage of JSS

Computational Information

• Process Parallelization Methods: MPI
• Thread Parallelization Methods: OpenMP
• Number of Processes: 35 - 630
• Elapsed Time per Case: 10 Hour(s)

Resources Used(JSS2)

Fraction of Usage in Total Resources*1(%): 1.91

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.

Resources Used(JSS3)

Fraction of Usage in Total Resources*1(%): 0.01

Details

Please refer to System Configuration of JSS3 for the system configuration and major specifications of JSS3.

*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 2020-March 2021