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CFD and CFD-DEM coupled simulation for a large-scale PSI test

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JAXA Supercomputer System Annual Report February 2024-January 2025 Report Number: R24EEE21100 Subject Category: Space Exploration PDF Responsible Representative: Kota Tanabe, JAXA Space Exploration Center, Space Exploration System Technology Unit Contact Information: Mitsuhisa Baba(baba.mitsuhisa@jaxa.jp) Members: Mitsuhisa Baba Abstract There is a risk that during spacecraft take-off and landing, large amounts of regolith will be scattered from the ground by the engine exhaust plume and that craters will be formed. We will develop technology to properly assess this risk and provide feedback・・・<<read more>>

Numerical Simulation on Hypersonic Boundary Layer

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JAXA Supercomputer System Annual Report February 2024-January 2025 Report Number: R24EEG60100 Subject Category: Research and Development PDF Responsible Representative: Shuto Yatsuyanagi, Research and Development Directorate, Research Unit IV Contact Information: Shuto Yatsuyanagi(yatrsuyanagi.shuto@jaxa.jp) Members: Shuto Yatsuyanagi Abstract The boundary layer transition is a critical phenomenon in the design of the thermal protection system (TPS) for re-entry capsules. The heat transfer coefficient of a turbulent boundary layer can be several times higher than that of a laminar boundary layer, in some cases・・・<<read more>>

Aerodynamic analysis of Japan's next generation mainstay launch vehicle

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JAXA Supercomputer System Annual Report February 2024-January 2025 Report Number: R24EEG60101 Subject Category: Research and Development PDF Responsible Representative: Hideaki Nanri, Director of Research Unit 4, Research and Development Directorate, Research Unit4 Contact Information: Mizuki Murakami(murakami.mizuki@jaxa.jp) Members: Mizuki Murakami Abstract Japan's next generation mainstay launch vehicle which reuses the first stage is being studied in order to reduce the space transportation cost drastically. The aerodynamic characteristics in the reentry phase is estimated analyticaly to evaluate the feasibility of vehicle system・・・<<read more>>

Predictive Analysis of Toxic Gas Dispersion

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JAXA Supercomputer System Annual Report February 2024-January 2025 Report Number: R24EEK10499 Subject Category: Space Technology PDF Responsible Representative: Hiroaki Sakai, Space Transportation Technology Directorate, Kagoshima Space Center, Ground Safety and Security Group Contact Information: Keita Kanakubo(JAXA)(kaakubo.keita@jaxa.jp) Members: Keita Kanakubo Abstract To improve the accuracy of analysis assuming an accident at the time of a launch of a key launch vehicle. During the launch of a key launch vehicle, propellant leakage due to satellite drop, etc., is considered to cause the・・・<<read more>>

Satellite Data Archive for Disaster Recovery Purpose

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JAXA Supercomputer System Annual Report February 2024-January 2025 Report Number: R24EER49901 Subject Category: Space Technology PDF Responsible Representative: Tomomi Nio, Space Technology Directorate I, Satellite Applications and Operations Center Contact Information: SAOC-MOS/EOC data archive team(SAOC-MOS@ml.jaxa.jp) Members: Tomomi Nio, Ryo Saito, Yuta Isshiki, Rio Kajiura, Sachiko Kawase, Takashi Maruyama Abstract The data from the Earth observation satellites "ADEOS-II (Midori 2)", "ADEOS (Midori)", "JERS-1 (Fuyo 1)", "MOS-1 (Momo 1)", and "MOS-1b (Momo 1b)", which ceased orbital operations by the Japanese fiscal year・・・<<read more>>