JAXA Supercomputer System Annual Report February 2024-January 2025 Report Number: R24EACA60 Subject Category: JSS Inter-University Research PDF Responsible Representative: Koji Miyaji, Professor, Yokohma National University Contact Information: Koji Miyaji(miyaji@ynu.ac.jp) Members: Kazuki Hyodo, Koji Miyaji, Kenichiro Takayanagi Abstract The static and dynamic stability of high-speed flying objects are evaluated by CFD. We Actual analysis target is the High-Mach Integrated Control experiment (HIMICO), a hypersonic integrated control experiment being jointly researched and developed by JAXA and several universities. We compare CFD analysis,・・・<<read more>>
JAXA Supercomputer System Annual Report February 2024-January 2025 Report Number: R24EACA61 Subject Category: JSS Inter-University Research PDF Responsible Representative: Kazuto Kuzuu, Professor, Department of Mechanical Engineering, Tokai University Contact Information: Kazuto Kuzuu, Tokai University(kuzuu@tsc.u-tokai.ac.jp) Members: Kazuto Kuzuu, Masato Ogawa Abstract When there is a flow path with a narrow diameter and temperature gradient in a gas-filled duct, acoustic vibration may occur thereby. This phenomenon is known as a thermoacoustic phenomenon, and the generated acoustic field may be accompanied by a・・・<<read more>>
JAXA Supercomputer System Annual Report February 2024-January 2025 Report Number: R24EACA63 Subject Category: JSS Inter-University Research PDF Responsible Representative: Ko Ogasawara, Tokyo Univercity of Science Contact Information: Kohei Koyama(7520040@ed.tus.ac.jp) Members: Koyo Ando, Kohei Koyama, Ko Ogasawara Abstract The aim of this study is to simulate aerodynamic heating around a vehicle flying at hypersonic speeds in the atmosphere and to identify flight conditions and vehicle designs that help reduce heat flux to the surface. The expected outcome is a reduction in・・・<<read more>>
JAXA Supercomputer System Annual Report February 2024-January 2025 Report Number: R24EACA64 Subject Category: JSS Inter-University Research PDF Responsible Representative: Nobuyuki Sawado, Professor, Tokyo University of Science Contact Information: Nobuyuki Sawado(sawadoph@rs.tus.ac.jp) Members: Nobuyuki Sawado, Yuta Suzuki, Kohei Shimasaki Abstract Mathematical models that describe phenomena of planetary atmosphere sometimes are closely related to nonlinear partial differential equation (PDE) in (quasi-)integrable systems. We try to give a formal mathematical characterization of the relationship between various quasi-integrable PDEs and these models of planetary atmospheres.・・・<<read more>>
JAXA Supercomputer System Annual Report February 2024-January 2025 Report Number: R24EACA65 Subject Category: JSS Inter-University Research PDF Responsible Representative: Naofumi Ohnishi, Professor, Department of Aerospace Engineering, Tohoku University Contact Information: Yuto Nakamura(yuto.nakamura.t4@dc.tohoku.ac.jp) Members: Yuto Nakamura, Naofumi Ohnishi Abstract On many fluid systems, such as aircraft and turbines, transition phenomena occur in the wake flow in which the vortex structure drasticaly changes. Since such transitions are accompanied by significant changes in flow frequency and hydrodynamic forces acting on the objects, it・・・<<read more>>
