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Molecular scattering dynamics at hyperthermal velocities and its impact on low drag satellite

Research Project

Project/Area Number 19H02346
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 24010:Aerospace engineering-related
Research InstitutionKobe University

Principal Investigator

Tagawa Masahito  神戸大学, 工学研究科, 准教授 (10216806)

Co-Investigator(Kenkyū-buntansha) 横田 久美子  神戸大学, 工学研究科, 助手 (20252794)
岩田 稔  九州工業大学, 大学院工学研究院, 准教授 (80396762)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥17,160,000 (Direct Cost: ¥13,200,000、Indirect Cost: ¥3,960,000)
Fiscal Year 2021: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2020: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2019: ¥7,930,000 (Direct Cost: ¥6,100,000、Indirect Cost: ¥1,830,000)
Keywords地球高層大気 / 大気密度 / 衛星大気抵抗 / 超低高度衛星 / 分子散乱 / 大気抵抗 / 原子状酸素 / 超低地球軌道 / 窒素分子 / 超低軌道 / 宇宙環境 / 宇宙機 / 超低軌道衛星
Outline of Research at the Start

本申請では、これまで世界的にもその重要性が十分認識されてこなかった「衛星表面での超熱気体分子の散乱ダイナミクス」を正しく理解するために、本申請者が所有する材料劣化研究用原子状酸素ビーム発生装置を用いた実験によるデータ収集を行う。さらに超熱速度領域の原子状酸素散乱ダイナミクスとDSMC計算と組み合わせることにより、低抵抗衛星設計の基本原理の獲得と、DSMC計算スキームの高度化を行う。これらの一連の研究により世界に先駆けて超低高度地球軌道領域を開拓する基盤技術を獲得することを目指す。

Outline of Final Research Achievements

In this project, angular distribution of scattering atoms on satellite materials was measured in order to reduce atmospheric drag of VLEO satellites. The results showed that the molecular beam scattering from the polyimide surface was dominated by the specular reflection component, while the diffuse reflection component increased for the material irradiated by atomic oxygen. Similar changes were observed for the polyimide exposed to LEO environment on the ISS. The scattering distribution obtained in this experiment was implemented as a scattering model in DSMC calculations to calculate satellite drag. It was shown that the atmospheric drag increased by the exposure to atomic oxygen, and that the drag could be reduced by using a two-dimensional material with a predominant specular reflection component as the surface material.

Academic Significance and Societal Importance of the Research Achievements

超低軌道(VLEO)領域では大気密度が大きいため、衛星の低抵抗化が重要な設計ポイントとなる。VLEOでの大気分子流れは分子流領域であることから、超低軌道衛星の低抵抗化には航空機とは全く異なる超熱速度希薄流体力学の適用が必要となるが、実験設備がなかったことから世界的にも未踏の学術領域である。本研究では独自のシステムにより超熱分子速度領域の分子散乱を実験的に計測し、低抵抗衛星設計技術の確立を行った。

Report

(4 results)
  • 2022 Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • Research Products

    (33 results)

All 2022 2021 2020 2019 Other

All Journal Article (6 results) (of which Peer Reviewed: 6 results,  Open Access: 1 results) Presentation (26 results) (of which Int'l Joint Research: 25 results,  Invited: 1 results) Remarks (1 results)

  • [Journal Article] Laser-detonation hyperthermal beam source applicable to VLEO environmental simulations2022

    • Author(s)
      Masahito Tagawa, Ryota Okura, Wataru Ide, Sasuga Horimoto, Keisuke Ezaki, Atsushi Fujita, Kosuke Shoda, Kumiko Yokota,
    • Journal Title

      CEAS Space Journal (2022) accepted

      Volume: 14

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Anisotropic molecular scattering at microstructured surface for rarefied gas compression inside air breathing ion engine2022

    • Author(s)
      Kosuke Shoda, Naoki Kano, Yuki Jotaki, Keisuke Ezaki, Kazuki Itatani, Takashi Ozawa, Yusuke Yamashita, Kazutaka Nishiyama, Kumiko Yokota, Masahito Tagawa
    • Journal Title

      EAS Space Journal

      Volume: 14

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effect of atomic hydrogen exposure on hydrogenated amorphous carbon thin films2022

    • Author(s)
      Yuichi Haruyama, Daiki Morimoto, Akira Heya, Koji Sumitomo, Seigo Ito, Kumiko Yokota, Masahito Tagawa,
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 61

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effect of simultaneous N2 collisions on atomic oxygen-induced polyimide erosion in sub-low Earth orbit: comparison of laboratory and SLATS data2021

    • Author(s)
      Kumiko Yokota, Masahito Tagawa, Yusuke Fujimoto, Wataru Ide, Yugo Kimoto, Yuta Tsuchiya, Aki Goto, Kazuki Yukumatsu, Eiji Miyazaki, Shunsuke Imamur
    • Journal Title

      EAS Space Journal

      Volume: 13 Pages: 389-397

    • NAID

      120007124107

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Study of rarefied aerodynamics for super low altitude satellite2021

    • Author(s)
      Takashi Ozawa, Shunsuke Imamura, Masahito Tagawa, Kazuhisa Fujita
    • Journal Title

      Aerospace Technology Japan

      Volume: 19 Pages: 407-414

    • NAID

      130008034519

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 宇宙機近傍プラズマ現象の数値シミュレーション2019

    • Author(s)
      三宅洋平, 臼井英之, 桐山武士, 白川遼, 田川雅人
    • Journal Title

      混相流

      Volume: 33 Pages: 258-266

    • NAID

      130007730019

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Presentation] Passive compression device in molecular flow by surface scattering: A key device for spacecraft intake system2022

    • Author(s)
      Masahito Tagawa, Yusaku Ashida Koki Sugimoto, Kosuke Shoda, Keisuke Ezaki, Kumiko Yokota, Takashi Ozawa, Yusuke Yamashita, Kazutaka Nishiyama
    • Organizer
      The 5th International Workshop on Scattering of Atoms and Molecules from Surfaces
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Atomic oxygen density variation measured by SLATS/AOFS: Comparison of flight data and atmospheric model predictions2022

    • Author(s)
      Masahito Tagawa, Kumiko Yokota, Atsushi Fujita, Wataru Ide, Yasunobu Miyoshi, Yuta Tsuchiya, Aki Goto, Kazuki Yukumatsu, Eiji Miyazaki, Yugo Kimoto
    • Organizer
      15th International Symposium on Materials in a Space Environment / 13th International Conference on Protection of Materials and Systems from Space Environment
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Shielding effect of atomic oxygen by satellite structure observed on SLATS and its compensation for material exposure experiment2022

    • Author(s)
      Masahito Tagawa, Kumiko Yokota, Wataru Ide, Atsushi Fujita, Shohei Urakawa, Yuta Tsuchiya, Aki Goto, Kazuki Yukumatsu, Eiji Miyazaki, Yugo Kimoto
    • Organizer
      15th International Symposium on Materials in a Space Environment / 13th International Conference on Protection of Materials and Systems from Space Environment
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] N2-acceleration effect on atomic oxygen-induced polyimide erosion in sub-LEO observed by SLATS/AOFS2022

    • Author(s)
      Kumiko Yokota, Masahito Tagawa, Wataru Ide, Atsushi Fujita, Sasuga Horimoto, Santa Nishioka, Keisuke Ezaki, Yuta Tsuchiya, Aki Goto, Kazuki Yukumatsu, Eiji Miyazaki, Yugo Kimoto
    • Organizer
      15th International Symposium on Materials in a Space Environment / 13th International Conference on Protection of Materials and Systems from Space Environment
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Impact of neutral atmosphere environment on SLATS2022

    • Author(s)
      Yugo Kimoto, Yuta Tsuchiya, Eiji Miyazaki, Aki Goto, Kazuki Yukumatsu, Shunsuke Imamura, Haruo Kawasaki, Masanori Sasaki, Kumiko Yokota, Masahito Tagawa, Wataru Ide, Atsushi Fujita, Shohei Urakawa, Sasuga Horimoto, Santa Nishioka
    • Organizer
      15th International Symposium on Materials in a Space Environment / 13th International Conference on Protection of Materials and Systems from Space Environment
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Space polymers erosion in simulated LEO and VLEO environments2022

    • Author(s)
      Zilina Iskanderova, Jacob Kleiman, Masahito Tagawa, Santa Nishioka, Sasuga Horimoto
    • Organizer
      15th International Symposium on Materials in a Space Environment / 13th International Conference on Protection of Materials and Systems from Space Environment
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Perspective on Atomic Oxygen Reaction with Thermal Control Materials in Space2022

    • Author(s)
      Masahito Tagawa, Kumiko Yokota
    • Organizer
      The 13th Asian Thermophysical Properties Conference,
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Performance change of field emission cathode by atomic oxygen irradiation2022

    • Author(s)
      Keisuke Ezaki, Kazuki Itatani, Yuki Fukami, Yusaku Ashida, Yasushi Ohkawa, Satomi Kawamoto, Kumiko Yokota, Masahito Tagawa
    • Organizer
      The 13th Asian Thermophysical Properties Conference,
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A research on material degradation of spacecraft in sub-low Earth orbit environment -An estimate of the contribution of inert molecule’s energy to the acceleration effect of the erosion of polyimide -2022

    • Author(s)
      Sasuga Horimoto, Santa Nishioka, Wataru Ide, Kumiko Yokota, Masahito Tagawa
    • Organizer
      The 13th Asian Thermophysical Properties Conference,
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Surface erosion of carbon-based materials in VLEO space environment: Collision-induced desorption by atmospheric N2 associated with oxidation by O2022

    • Author(s)
      Kumiko Yokota, Sasuga Horimoto, Wataru Ide, Santa Nishioka, Masahito Tagawa
    • Organizer
      The 14th International Symposium on Atomic Level Characterization of New Materials and Devices
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Accelerated AO-induced polyimide erosion in VLEO by simultaneous collisions of hyperthermal N2 molecules2021

    • Author(s)
      Sasuga Horimoto, Atsushi Fujita, Wataru Ide, Kumiko Yokota, Masahito Tagawa
    • Organizer
      1st International Symposium on VLEO Missions and Technologies, Manchester, UK, June 28-29, 2021
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Atmospheric density probe for VLEO applications2021

    • Author(s)
      Taishi Kato, Shoma Taira, Momoka Shimoi, Kumiko Yokota, Yoshinori Nakayama, Takashi Ozawa, Masahito Tagawa
    • Organizer
      1st International Symposium on VLEO Missions and Technologies, Manchester, UK, June 28-29, 2021
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] VLEO-related research activities at Kobe University2021

    • Author(s)
      Masahito Tagawa, Wataru Ide, Naoki Kano, Momoka Shimoi, Yuki Fukami, Kosuke Shoda, Taishi Kato, Kazuki Itatani, Atsushi Fujita, Sasuga Horimoto, Keisuke Ezaki, Shoma Taira, Yuki Jotaki, Kumiko Yokota
    • Organizer
      1st International Symposium on VLEO Missions and Technologies, Manchester, UK, June 28-29, 2021
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Molecular scattering at microstructured surface for rarefied gas compression inside air breathing ion engine2021

    • Author(s)
      Kosuke Shoda, Naoki Kano, Yuki Jotaki, Keisuke Ezaki, Kazuki Itatani, Takashi Ozawa, Yusuke Yamashita, Kazutaka Nishiyama, Kumiko Yokota, Masahito Tagawa
    • Organizer
      1st International Symposium on VLEO Missions and Technologies, Manchester, UK, June 28-29, 2021
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] AO density variations during geomagnetic anomaly observed by SLATS2021

    • Author(s)
      Atsushi Fujita, Kumiko Yokota, Masahito Tagawa, Wataru Ide, Sasuga Horimoto, Yugo Kimoto, Yuta Tsuchiya, Aki Goto, Kazuki Yukumatsu, Eiji Miyazaki, Yasunobu Miyoshi
    • Organizer
      2nd Applied Space Environments Conference, November 1-5, 2021, Online
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Effect of direct atomic oxygen exposures on carbon nanotube field emission cathode: comparison of flight data and in-situ ground-based experiment2021

    • Author(s)
      Kazuki Itatani, Keisuke Ezaki, Fukami Yuki, Kumiko Yokota, Masahito Tagawa, Yasushi Ohkawa, Satomi Kawamoto
    • Organizer
      2nd Applied Space Environments Conference, November 1-5, 2021, Online
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Scattering behavior of thermal molecular beams at microstructured surface for high compression intake system of air breathing ion engine2021

    • Author(s)
      Keisuke Ezaki, Kosuke Shoda, Kazuki Itatani, Yuki Jotaki, Yuki Jotaki, Yusaku Ashida, Koki Sugimoto, Takashi Ozawa, Yusuke Yamashita, Kazutaka Nishiyama, Kumiko Yokota, Masahito Tagawa
    • Organizer
      33rd International Symposium on Space Technology and Science, February 26 - March 4, 2022, Online
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Development of atmospheric density probe aboard S-520-32 sounding rocket2021

    • Author(s)
      Shoma Taira, Taishi Kato, Momoka Shimoi, Taiga Adachi, Towa Ushijima, Yusuke Yamashita, Takashi Ozawa, Takumi Abe, Yoshinori Nakayama, Kumiko Yokota, Masahito Tagawa
    • Organizer
      33rd International Symposium on Space Technology and Science, February 26 - March 4, 2022, Online
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Ground-based experiment for simultaneous N2 collision effect on atomic oxygen-induced polyimide erosion in sub-low Earth orbit2021

    • Author(s)
      Sasuga Horimoto, Atsushi Fujita, Shohei Urakawa, Santa Nishioka, Wataru Ide, Kumiko Yokota, Masahito Tagawa
    • Organizer
      33rd International Symposium on Space Technology and Science, February 26 - March 4, 2022, Online
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Result of Exposure Experiment of Piezoelectric Actuators Using ExHAM2021

    • Author(s)
      Nozomu Kogiso, Hiroaki Tanaka, Tadashige Ikeda, Kosei Ishimura, Masato Tagawa, Minoru Iwata, Motoharu Fujigaki
    • Organizer
      33rd International Symposium on Space Technology and Science, February 26 - March 4, 2022, Online
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 超低軌道衛星への挑戦 ―宇宙の渚へアクセスする技術開発―2020

    • Author(s)
      田川雅人、横田久美子
    • Organizer
      うめきたSpace Laboratory, Vol.1 and Vol.2
    • Related Report
      2019 Annual Research Report
  • [Presentation] Atomic Oxygen Exposure Test Capabilities at Kobe University: Its Performance and Limitations2019

    • Author(s)
      Kumiko Yokota, Masahito Tagawa, Jacob I. Kleiman
    • Organizer
      Advanced Space Environmental Conference
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Reduced Dissociation of Molecules in Laser-Detonation-Driven Hyperthermal Beams2019

    • Author(s)
      Masahito Tagawa, Ryota Okura, Kumiko Yokota
    • Organizer
      Advanced Space Environmental Conference
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Particle simulations of ECR plasma generation in air breathing ion engine2019

    • Author(s)
      Ryo Shirakawa, Hideyuki Usui, Yohei Miyake, Masahito Tagawa, Kazutaka Nishiyama
    • Organizer
      Joint Symposium of 32nd International Symposium on Space Technology and Science and 9th Nano-Satellites Symposium
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Study of rarefied aerodynamics for super low altitude satellites2019

    • Author(s)
      Takashi Ozawa, Shunsuke Imamura, Masahito Tagawa, Kazuhisa Fujita
    • Organizer
      Joint Symposium of 32nd International Symposium on Space Technology and Science and 9th Nano-Satellites Symposium
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Importance of atom-surface scattering on the design criteria of future air breathing ion engine2019

    • Author(s)
      M. Tagawa, K. Yokota, R. Shirakawa, N. Kano, M. Shimoi, F. Ezuka, K. Matsuoka, S. Imamura, K. Nishiyama, T. Ozawa
    • Organizer
      23rd International Workshop on Inelastic Ion-Surface Collisions
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Remarks] 神戸大学大学院工学研究科における宇宙環境研究のページ

    • URL

      http://www.space-environmental-effect.jp/index.html

    • Related Report
      2021 Annual Research Report 2020 Annual Research Report

URL: 

Published: 2019-04-18   Modified: 2024-01-30  

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