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Study of high-fidelity numerical schemes for compressible turbulent flows

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JAXA Supercomputer System Annual Report April 2017-March 2018 Report Number: R17EACA04 Subject Category: JSS2 Inter-University Research PDF Responsible Representative: Soshi Kawai, Tohoku University, Aerospace Engineering Contact Information: Hiroyuki Asada asada@cfd.mech.tohoku.ac.jp Members: Hiroyuki Asada, Soshi Kawai Abstract This study focuses on developing numerical scheme based on discontinuous Galerkin (DG) methods and large eddy simulation (LES) for high-fidelity compressible turbulent flow simulations around aircraft to enhance guidelines for designing next-generation low-noise aircrafts by clarifying the details of airframe noise generation. Reference URL・・・<<read more>>

Three-dimensional turbulent magnetic reconnection

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JAXA Supercomputer System Annual Report April 2017-March 2018 Report Number: R17EACA29 Subject Category: JSS2 Inter-University Research PDF Responsible Representative: Shuoyang Wang, The University of Tokyo Contact Information: Shuoyang Wang yokoyama.t@eps.s.u-tokyo.ac.jp Members: Shuoyang Wang, Takaaki Yokoyama Abstract Magnetic reconnection is one of the most important basic processes in plasma physics. It helps building up models for various astronomical events. Most of these events have large system size, while the diffusion region where reconnection literally happens is small due to weak diffusivity・・・<<read more>>

Study on Acoustic Analysis Techniques to Improve Aerospace Interior Acoustic Environment

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JAXA Supercomputer System Annual Report April 2017-March 2018 Report Number: R17EA1902 Subject Category: Aeronautical Technology PDF Responsible Representative: Takashi Aoyama, Aeronautical Technology Directorate, Numerical Simulation Research Unit Contact Information: Takashi Takahashi takahashi.takashi@jaxa.jp Members: Takashi Takahashi, Yuya Ohmichi, Masashi Kanamori, Takahiro Higash, Kento Yamada, Kan Ohkubo, Tatsuya Narumi Abstract We study the numerical prediction approaches of sound sources, propagation and transmission for practical aerospace applications (e.g. aircraft interior noise prediction, etc.). Our aim is to upgrade the respective technologies in order・・・<<read more>>

Study on Simulation Technology to Realize Front Loading of Combustor Design Process

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JAXA Supercomputer System Annual Report April 2017-March 2018 Report Number: R17EA1903 Subject Category: Aeronautical Technology PDF Responsible Representative: Yasuhiro Mizobuchi, Aeronautical Technology Directrate, Numerical Simulation Research Unit Contact Information: Yasuhiro Mizobuchi mizo@chofu.jaxa.jp Members: Manabu Hisida, Taisuke Nambu, Hiroki Yao, Shogo Yasuda, Yuichi Matsuo, Yasuhiro Mizobuchi, Hiroyuki Abe, Takeshi Okabe, Shingo Matsuyama Abstract Enhancement of front loading of engine design process by simulation technology. Reference URL N/A Reasons for using JSS2 World-level research in this field requires massively parallel huge computational・・・<<read more>>

Study of Green engine (study of ultrahigh-temperature low NOx emission combustor technology) atomization process of a fuel spray nozzle in a practical geometry

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JAXA Supercomputer System Annual Report April 2017-March 2018 Report Number: R17EA0730 Subject Category: Aeronautical Technology PDF Responsible Representative: Toshiya Nakamura, Aeronautical Technology Directorate, Next Generation Aeronautical Innovation Hub Center Contact Information: Kazuaki Matsuura matsuura.kazuaki@jaxa.jp Members: Kazuaki Matsuura, Mitsumasa Makida, Naoki Nakamura, Jun Iino, Huilai Zhang Abstract The atomization process occurs in the narrow region which is vicinity of the injection outlet in a practical geometry fuel injector under development in Green engine project. Therefore, it is difficult to understand the・・・<<read more>>