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Long-term orbital environment prediction by orbital debris evolutionary model

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JAXA Supercomputer System Annual Report February 2022-January 2023 Report Number: R22EG3105 Subject Category: Research and Development PDF Responsible Representative: Hiroyuki Sugita, Research and Development Directorate, Research Unit II Contact Information: HARADA Ryusuke(harada.ryuusuke@jaxa.jp) Members: Ryusuke Harada, Yoshiyuki Iwasaki, Yasuhiro Kitagawa, Satomi Kawamoto, Nobuaki Nagaoka Abstract Increase of space debris is a problem for reliability of sustainable space activity. JAXA has researched space debris related technology for space debris mitigation and environmental remediation. The effectiveness of space debris countermeasures is evaluated based・・・<<read more>>

Study on Future Space Transportation System using Air-breathing Engines

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JAXA Supercomputer System Annual Report February 2022-January 2023 Report Number: R22EG3205 Subject Category: Research and Development PDF Responsible Representative: Kouichi Okita, Director, Research and Development Directorate, Research Unit IV Contact Information: Masatoshi Kodera(kodera.masatoshi@jaxa.jp) Members: Masaaki Fukui, Mizuki Fujiwara, Tatsushi Isono, Taku Inoue, Masatoshi Kodera, Takafumi Tano, Masaharu Takahashi, Sadatake Tomioka, Masahiro Takahashi Abstract Recently, reusable rockets have been being studied to reduce the cost of space transportation systems significantly. However, in order to extend the structural lifetime, it is necessary・・・<<read more>>

Wall-modeled large-eddy simulation for prediction of wall heat flux in rocket engine combustor

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JAXA Supercomputer System Annual Report February 2022-January 2023 Report Number: R22EFHC0305 Subject Category: Large-Scale Challenge PDF Responsible Representative: Naoyuki Fujita, Manager, Security and Information Systems Department, Supercomputer Division Contact Information: Takanori Haga, Research and Development Directorate, Research Unit III(haga.takanori@jaxa.jp) Members: Yuma Fukushima, Takanori Haga, Hiroyuki Ito Abstract A large-eddy simulation (LES) is performed to quantitatively evaluate the wall heat flux in a sub-scale rocket engine combustor. Accurate prediction of wall heat flux is necessary to assess the risk of melt・・・<<read more>>

Research for Future Transportation System (Research for Scramjet Engine Flow Path)

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JAXA Supercomputer System Annual Report February 2022-January 2023 Report Number: R22EG3104 Subject Category: Research and Development PDF Responsible Representative: Shigeru Sato, Researcher, Research Unit 4, Research and Development Directorate Contact Information: Shigeru Sato, Researcher, Research Unit 4, Research and Development Directorate, sato.shigeru@jaxa.jp(sato.shigeru@jaxa.jp) Members: Shigeru Sato, Masaaki Fukui, Taku Inoue, Toshihiko Munakata, Masaharu Takahashi Abstract The purpose is to investigate the influence of the internal flow path on the engine performance by help of CFD in the viewpoint of aerodynamics about・・・<<read more>>

Examination of ISAS's scientific satellitedata processing using JSS

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JAXA Supercomputer System Annual Report February 2022-January 2023 Report Number: R22EEU30800 Subject Category: Space and Astronautical Science PDF Responsible Representative: NAKAHIRA, Satoshi, Center for Science-satellite Operation and Data Archive, ISAS Contact Information: NAKAHIRA, Satoshi(nakahira.satoshi@jaxa.jp) Members: Ken Ebisawa, Satoshi Nakahira Abstract Examine and demonstrate technologies for parallel processing of scientific satellite data at ISAS. Reference URL N/A Reasons and benefits of using JAXA Supercomputer System The resources required for fast data reprocessing are increasing due to the sophistication of observation equipment・・・<<read more>>