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The Effect of Protuberant Devices on Aerodynamic Characteristics of Slender Body Vehicle

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JAXA Supercomputer System Annual Report April 2017-March 2018 Report Number: R17EACA20 Subject Category: JSS2 Inter-University Research PDF Responsible Representative: Keiichi Kitamura, Yokohama National University Contact Information: Toshiaki Harada harada-toshiaki-vt@ynu.jp Members: Toshiaki Harada, Keiichi Kitamura Abstract It is important for rocket developments to quantitatively estimate the influence of protuberances in the flight vehicles which create asymmetry of flow around the vehicles and aerodynamic forces. Using fluid numerical computation, it is expected that we obtain a guideline for the protuberance choice in・・・<<read more>>

Study of the Aerodynamic Interaction between the rotor and the wing on a compound helicopter

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JAXA Supercomputer System Annual Report April 2017-March 2018 Report Number: R17EA3301 Subject Category: Aeronautical Technology PDF Responsible Representative: Yasutada Tanabe, Aeronautical Technology Directorate, Next Generation Aeronautical Innovation Hub Center Contact Information: Yasutada Tanabe tanabe.yasutada@jaxa.jp Members: Masahiko Sugiura, Yasutada Tanabe, Hideaki Sugawara, Ryo Hayakawa Abstract A distinctive concept of compound helicopter is proposed by JAXA. Several key technologies have been recognized and investigated so far. Within them, the aerodynamic interaction between the main rotor and the wing may cause remarkable increase・・・<<read more>>

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>>