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Aerodynamics and Aeroacoustics Analysis for Multirotor

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JAXA Supercomputer System Annual Report February 2023-January 2024 Report Number: R23ECMP27 Subject Category: Competitive Funding PDF Responsible Representative: Kanako, Yasue, Aviation Technology Directorate, Aircraft Lifecycle Innovation Hub Contact Information: Hideaki Sugawara(sugawara.hideaki@jaxa.jp) Members: Mahiro Iwaki, Ryo Nishino, Hideaki Sugawara, Ryo Takahashi Abstract This work focuses on a blade design for multirotors such as drones and electric vertical take-off and landing (eVTOL) aircraft. The numerical simulations are conducted to investigate the blade designs that achieve both aerodynamic performance and low aerodynamic noise.・・・<<read more>>

Efficient spatial second-order precision compressible fluid calculation method with resolution equivalent to fifth-order precision

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JAXA Supercomputer System Annual Report February 2023-January 2024 Report Number: R23ECMP26 Subject Category: Competitive Funding PDF Responsible Representative: Kazuyuki Nakakita, Aviation Technology Directorate, Aircraft Lifecycle Innovation Hub Contact Information: Andrea Sansica(sansica.andrea@jaxa.jp) Members: Gaku Fukushima, Keiichi Kitamura, David Lusher, Tomohiro Mamashita, Andrea Sansica Abstract In this study, we move from the MUSCL framework and use the MUSCL-THINC method, which gives the physical quantity distribution within a numerical cell as a hyperbolic function, allowing to sharply capture shock wave discontinuities. Reference URL・・・<<read more>>

Development of technologies for hydrogen aircraft

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JAXA Supercomputer System Annual Report February 2023-January 2024 Report Number: R23ECMP25 Subject Category: Competitive Funding PDF Responsible Representative: Takayuki Kojima,team leader, Hydrogen Aircraft Core Technology Development Team Contact Information: Takuya Mitsukawa(mitsukawa.takuya@jaxa.jp) Members: Takuya Mitsukawa Abstract According to the specifications of hydrogen aircraft, we prototype and test a "boost pump" to pump up liquid hydrogen from a tank and an "engine pump" to supply high pressure hydrogen to the engine, and support product development by KHI and others. This work was・・・<<read more>>

Analysis and high-efficiency control of unsteady aerodynamic phenomena based on simultaneous measurement of pressure, temperature, position, and deformation

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JAXA Supercomputer System Annual Report February 2023-January 2024 Report Number: R23ECMP19 Subject Category: Competitive Funding PDF Responsible Representative: Kazuyuki Nakakita, Aviation Technology Directorate, Aircraft Lifecycle Innovation Hub Contact Information: Yoimi Kojima(kojima.yoimi@jaxa.jp) Members: Kota Abe, Masato Imai, Kohei Konishi, Itsuki Miyamoto, Kazuyuki Nakakita, Yoimi Kojima, Keita Ogura, Hideaki Sugawara, Kosuke Saito, Takumi Yumino Abstract We will establish a method for simultaneous measurement of pressure, temperature, position, and deformation for flow around a wing, and use this method to elucidate unsteady aerodynamic・・・<<read more>>

Fundamental Researches of Fluid and Combustion for the Hypersonic Flight

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JAXA Supercomputer System Annual Report February 2023-January 2024 Report Number: R23ECMP18 Subject Category: Competitive Funding PDF Responsible Representative: Kouichi Okita, Director, Research Unit IV, Research and Development Directorate Contact Information: Masahiro Takahashi(takahashi.masahiro@jaxa.jp) Members: Masaaki Fukui, Susumu Hasegawa, Taku Inoue, Masatoshi Kodera, Masaharu Takahashi, Sadatake Tomioka, Masahiro Takahashi, Shun Takahashi, Gouji Yamada Abstract The wind tunnel tests by using sub-scaled models play important roles for the development of the air-breathing propulsion system for a hypersonic transporter. However, in some cases, the・・・<<read more>>