JAXA Supercomputer System Annual Report February 2025-January 2026

Report Number: R25ECMP60

Subject Category: Competitive Funding

PDF (to be added)

• Responsible Representative: Atsushi Hashimoto, Aeronautical Technology Directorate, XANADU project team
• Contact Information: Masashi Kanamori(kanamori@chofu.jaxa.jp)
• Members: Ryosuke Fuse, Mami Hayakawa, Kenji Hayashi, Takashi Ishida, Kenichi Kubota, Masashi Kanamori, Takahisa Kohno, Taisuke Nambu, Yuya Ohmichi, Shu Sakamoto, Tatsuki Sakamoto, Mizuki Uono, Satoshi Yui

Abstract

This project is in response to NEDO's proposal for the "Key and Advanced Technology R&D through Cross Community. Collaboration Program/Development and Demonstration of Advanced Technologies for Developing and Manufacturing Processes Using Digital Technologies for Designing, Manufacturing, and Certifying Aircraft" (hereinafter referred to as "K-Pro"). Currently, a domestic heavy industry manufacturer and JAXA are jointly making this proposal. In the period from FY2023 to FY2027, K-Pro is required to implement four major items, one of which is the design DX of this project. The theme of design DX is the innovation of the conceptual design flow, and the aim is to reduce the rework period by 30% by introducing MBSE-MBD linkage in the design process from the aircraft level to the component level. JAXA will be mainly responsible for the MBD part of aircraft and engines, and will contribute to the achievement of the above goals by improving the fidelity of aerodynamic analysis and other aspects at an early stage of design. Specifically, the goal is to complete the evaluation of the required aerodynamic performance of aircraft design candidates (up to 10,000 individuals) provided by heavy industries within the specified period through CFD analysis, etc., and to create a database of compressor analysis results that will contribute to the design of engines.

Reference URL

N/A

Reasons and benefits of using JAXA Supercomputer System

In this project, it is necessary to evaluate various aerodynamic performance by CFD analysis for a very large number of design candidates and design conditions provided by heavy industry manufacturers. In order to do so, it is necessary to have computing resources that can evaluate a very large number of candidates by numerical analysis at the necessary timing, while ensuring security recognized by heavy industry manufacturers. There is no other company that can meet these conditions, except for JSS.

Achievements of the Year

Regarding contributions to a conceptual design flow covering the entire aircraft system, we successfully completed the reduced-order model (ROM) construction process - which evaluates shapes of up to 10,000 individuals as developed in the past year - and its performance evaluation. Additionally, through collaboration with a manufacturer, we performed even more realistic CFD analysis and optimization, and completed all required tasks within the designated timeframe. Notably, we newly developed a turbulence model capable of accurately predicting maximum lift coefficient during high-lift configurations for aircraft takeoff and landing using steady-state calculations. This enabled practical performance evaluations of critical conditions during the limited design timeline.

A flow‑field database intended as reference data for improving the accuracy of RANS analyses of engine compressors was generated through detailed simulations using Zonal DES. Analyses were performed on a three‑dimensional rotor, including tip clearance, as well as on a multi‑stage axial compressor, and a flow‑field database meeting the target accuracy was successfully created.

The achievements above were based on results obtained from a project, JPNP22007, commissioned by the New Energy and Industrial Technology Development Organization (NEDO).

Publications

- Oral Presentations

Masashi Kanamori, Takashi Ishida and Kenichi Kubota, Modification of Turbulence Model for Separated Flows at High Angles of Attack Using Equation Inference Technique, 63rd Aircraft Symposium (in Japan)

Takaaki Yokoyama, Yuki Utsumi, Hiroshi Nagakura(MHI), Masashi Kanamori, Omichi Yuya and Kenichi Kubota(JAXA), Aircraft Conceptual Design Process with System Descriptive Model and Analytical Model, 63rd Aircraft Symposium (in Japan)

Kentaro Hirota, Tomoki Yamazaki, Tomonori Enoki, Kotaro Hisaeda, Naoki Tani, Toshiya Sakai (IHI),Taisuke Nambu, Kenichi Kubota (JAXA), Design DX 2 Development of Adaptation Techniques for MBSE Methods to Aircraft Engine, 63rd Aircraft Symposium (in Japan)

Takaaki Yokoyama, Yuki Utsumi, Hiroshi Nagakura(MHI), Masashi Kanamori, Omichi Yuya and Kenichi Kubota(JAXA), Model-Based Multi-Fidelity Convergent Design Process for Commercial Aircraft, AIAA SciTech2026

Usage of JSS

Computational Information

• Process Parallelization Methods: MPI
• Thread Parallelization Methods: Automatic Parallelization
• Number of Processes: 480 - 2880
• Elapsed Time per Case: 2 Hour(s)

JSS3 Resources Used

Fraction of Usage in Total Resources*1(%): 6.76

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.

ISV Software Licenses Used

*2: Fraction of Usage：Percentage of usage relative to each resource used in one year.

JAXA Supercomputer System Annual Report February 2025-January 2026