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Numerical Study on Combustible Flow in Supersonic Flight Engines and Rocket Engines

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JAXA Supercomputer System Annual Report February 2025-January 2026 Report Number: R25EACA01 Subject Category: JSS Inter-University Research PDF Responsible Representative: Nobuyuki Tsuboi, Professor, Kyuchu Institute of Technology Contact Information: Nobuyuki Tsuboi(tsuboi@mech.kyutech.ac.jp) Members: Takumi Ito, Tsuyoshi Ifuku, Nobuyuki Tsuboi, Yuta Toshima Abstract Numerical analysis of the aerodynamic characteristics of the RV-X will contribute to improved aircraft design and accurate guidance to the landing site. Reference URL N/A Reasons and benefits of using JAXA Supercomputer System We need to use a supercomputer for・・・<<read more>>

Numerical analysis on atomization and spray combustion

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JAXA Supercomputer System Annual Report February 2025-January 2026 Report Number: R25EA2150 Subject Category: Aeronautical Technology PDF Responsible Representative: Junichi Kazawa, Japan Aerospace Exploration Agency, Aeronautical Technology Directorate, Aviation Environmental Sustainability Innovation Hub Contact Information: Kazuaki Matsuura, Japan Aerospace Exploration Agency, Aeronautical Technology Directorate, Aviation Environmental Sustainability Innovation Hub(matsuura.kazuaki@jaxa.jp) Members: Kazuaki Matsuura, Kinya Saito, Kodai Kato, Jun Iino, Naoki Nakamura, Mitsumasa Makida Abstract A numerical study is performed to clarify phenomena on atomization and spray combustion. Reference URL N/A Reasons and・・・<<read more>>

Development of an EnKF-based ocean data assimilation system

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JAXA Supercomputer System Annual Report February 2025-January 2026 Report Number: R25ER2402 Subject Category: Space Technology PDF Responsible Representative: Osamu Ochiai, Director, Space Technology Directorate I, Earth Observation Research Center Contact Information: Misako Kachi(kachi.misako@jaxa.jp) Members: Misako Kachi, Shun Ohishi Abstract With the recent enhancement of ocean observation networks by satellites and Argo profiling floats, spatiotemporally higher-resolution temperature, salinity, and sea surface height have been observed. However, for example, the satellites cannot observe under rainy conditions, and the number of Argo float・・・<<read more>>

Research for data assimilation of satellite global rainfall map

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JAXA Supercomputer System Annual Report February 2025-January 2026 Report Number: R25ER0201 Subject Category: Space Technology PDF Responsible Representative: Osamu Ochiai, Director, Space technology Directorate I, Earth Observation Research Center Contact Information: Space technology Directorate I, Earth Observation Research Center, Takuji Kubota(kubota.takuji@jaxa.jp) Members: Mayumi Yoshioka, Masaki Satoh, Shun Ohishi, Takemasa Miyoshi, Shunji Kotsuki, Kosuke Yamamoto, Takuji Kubota Abstract This study explores an effective use of satellite data including GSMaP and GPM/DPR through an advanced ensemble data assimilation method for improving numerical・・・<<read more>>

Numerical Simulations for H3 Rocket Development

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JAXA Supercomputer System Annual Report February 2025-January 2026 Report Number: R25EK2302 Subject Category: Space Technology PDF Responsible Representative: Makoto Arita, Space Transporation Technology Directorate, H3 Project Team Contact Information: Hideyo Negishi(negishi.hideyo@jaxa.jp) Members: Junya Aono, Masaharu Abe, Hiroaki Amakawa, Yu Daimon, Taroh Fukuda, Hironori Fujiwara, Osamu Fukasawa, Takanori Haga, Shotaro Hamato, Hiroyuki Ito, Shingo Matsuyama, Hideyo Negishi, Takenori Nakajima, Shinji Ohno, Yasuhito Okano, Taro Shimizu, Ryotaro Sakai, Seiji Tsutsumi, Masashi Toyama, Satoshi Ukai, Keita Yamamoto, Rika Yamada Abstract Please refer to・・・<<read more>>