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Optimal design of propellers for compound helicopters

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JAXA Supercomputer System Annual Report February 2023-January 2024 Report Number: R23EDA201C21 Subject Category: Aeronautical Technology PDF Responsible Representative: Kanako Yasue, Aviation Technology Directorate, team leader, Aircraft Life-cycle Innovation Hub, Airmobility Digital Design Team Contact Information: Keita Kimura(kimura.keita@jaxa.jp) Members: Fumihiro Kajiwara, Keita Kimura, Masahiko Sugiura, Hideaki Sugawara, Ryo Takahashi, Yasutada Tanabe Abstract The objective of this study is to implement the optimal design of side and tail propellers for JAXA’s proposed compound helicopter. The shapes are optimized to meet the design・・・<<read more>>

Aerodynamic Analysis for High-speed rotorcraft

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JAXA Supercomputer System Annual Report February 2023-January 2024 Report Number: R23EDA201C20 Subject Category: Aeronautical Technology PDF Responsible Representative: Kanako, Yasue, Aviation Technology Directorate, Aircraft Lifecycle Innovation Hub Contact Information: Hideaki Sugawara(sugawara.hideaki@jaxa.jp) Members: Fumihiro Kajiwara, Yuki Kishi, Keita Kimura, Hideaki Sugawara, Ryo Takahashi, Yasutada Tanabe, Kanako Yasue Abstract Rotorcrafts have complex mechanisms around the main rotor and are exposed to non-streamlined shape parts, resulting in large aerodynamic drag. The aerodynamic drag of the hub accounts for 30% of the total drag・・・<<read more>>

Research on High Performance Control Surfaces and High Lift Devices

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JAXA Supercomputer System Annual Report February 2023-January 2024 Report Number: R23EDA201C18 Subject Category: Aeronautical Technology PDF Responsible Representative: Dongyoun Kwak, Aviation Enviromental Sustanability Innovation Hub, Aviation Technology Directorate Contact Information: Mitsuhiro Murayama, Aviation Environmental Sustainability Innovation Hub, Aviation Technology Directorate(murayama.mitsuhiro@jaxa.jp) Members: Ryutaro Furuya, Yasushi Ito, Mitsuhiro Murayama Abstract The purpose of the research is to develop and mature a bunch of elemental technologies on aerodynamics, aeroacoustics, structures and sensing and system design technologies to achieve high perfromance control surfaces and・・・<<read more>>

Research on aircraft cabin noise reduction

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JAXA Supercomputer System Annual Report February 2023-January 2024 Report Number: R23EDA201C00 Subject Category: Aeronautical Technology PDF Responsible Representative: Kenichiro Nagai, Aviation Technology Directorate, Aviation Environmental SustainabiAviation Environmental Sustainability Innovation Hub Contact Information: Takashi Takahashi(takahashi.takashi@jaxa.jp) Members: Keita Nakamoto, Takashi Takahashi Abstract This research focuses on the development of our cabin noise prediction tool using the Finite-Difference Time-Domain method, and in-flight noise measurement in the JAXA’s Jet-Flying Test Bed (FTB) “HISHO” with the aim of grasping the cabin noise characteristics. Reference URL・・・<<read more>>

Analyses of Hypersonic Flows around Capsules and Attitude Instability of Capsules

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JAXA Supercomputer System Annual Report February 2023-January 2024 Report Number: R23EDA201A32 Subject Category: Aeronautical Technology PDF Responsible Representative: Kenji Fujii, Aviation Technology Directorate, Fundamental Aeronautics Research Unit Contact Information: Takashi Ozawa(ozawa.takashi@jaxa.jp) Members: Takashi Ozawa, Yoshihiro Shimizu, Takaki Uwazumi Abstract In this study, we try to enhance physical models for high temperature gas and numerical simulation method to accurately predict heating and aerodynamic characteristics at atmospheric entry. We aim to develop high fidelity simulation tool by demonstrating improvement of prediction accuracy・・・<<read more>>