Development of Measurement System for Martian Rarefied Aerodynamics and Investigation of Condensation Effect in Hypersonic Rarefied Wind Tunnel

• Project/Area Number: 15K06611
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Aerospace engineering
• Research Institution: Japan Aerospace EXploration Agency
• Principal Investigator: Ozawa Takashi 国立研究開発法人宇宙航空研究開発機構, 研究開発部門, 研究開発員 (70567544)
• Co-Investigator(Kenkyū-buntansha): 鈴木 俊之 国立研究開発法人宇宙航空研究開発機構, 研究開発部門, 主任研究開発員 (20392839)
• Co-Investigator(Renkei-kenkyūsha): FUJITA KAZUHISA 国立研究開発法人宇宙航空研究開発機構, 研究開発部門, 研究領域主幹 (90281584)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000); Fiscal Year 2017: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000); Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2015: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
• Keywords: 航空宇宙工学 / 希薄風洞 / 数値解析 / 希薄気体力学 / DSMC / 極超音速流

Outline of Final Research Achievements

For Mars atmospheric entry, it is crucial to improve understanding of aerodynamic characteristics in CO2 hypersonic rarefied gas flows. The 100-mm Hypersonic Rarefied Wind Tunnel (HRWT) at Japan Aerospace Exploration Agency has been extended to CO2 rarefied hypersonic flows by installing a new heater system. In this work, we first developed a pitot tube measurement system and a particle simulation code for CO2 condensing flows. According to particle simulation results for flows around pitot tubes, we have analyzed super-saturation region for CO2. Second, we have developed an integration scheme between HRWT measurements using pendulous models and particle simulations for the determination of CO2 surface accommodation coefficients and analyzed condensation effect on the accuracy of aerodynamic prediction for CO2 hypersonic rarefied flows.

Research Products

• [Journal Article] Pitot Pressure Analyses in CO2 Condensing Rarefied Hypersonic Flows (2016)
  • Author(s): Ozawa, T., Suzuki, T., and Fujita, K.
  • Journal Title: AIP Conference Proceedings Volume: 1786 Pages: 190010-190010
  • DOI: 10.1063/1.4967688
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] 超低高度衛星の希薄空力特性評価に向けた希薄風洞計測と数値解析 (2016)
  • Author(s): 小澤宇志，今村俊介，川崎春夫，鈴木俊之，藤田和央，佐々木雅範
  • Journal Title: 宇宙航空研究開発機構特別資料 Volume: JAXA-SP-16-007 Pages: 167-171
  • NAID: 120006827558
  • Acknowledgement Compliant
• [Journal Article] Investigation of Condensation Effect in CO2 Hypersonic Rarefied Flows (2016)
  • Author(s): Ozawa, T., Suzuki, T., and Fujita, K.
  • Journal Title: AIAA Paper Volume: 2016-1729
  • Acknowledgement Compliant
• [Journal Article] Investigation of Rarefaction and Condensation Effects in Hypersonic Rarefied Flows (2016)
  • Author(s): Ozawa, T., Suzuki, T., and Fujita, K.
  • Journal Title: TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN Volume: 14 Issue: ists30 Pages: Pe_1-Pe_6
  • DOI: 10.2322/tastj.14.Pe_1
  • NAID: 130005126069
  • ISSN: 1884-0485
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] 高クヌーセン数領域における極超音速希薄流数値解析 (2016)
  • Author(s): 小澤宇志，鈴木俊之，藤田和央
  • Journal Title: 宇宙航空研究開発機構特別資料 Volume: 15-013 Pages: 91-96
  • NAID: 120006827606
  • Peer Reviewed
• [Presentation] Investigation of Condensation and Evaporation Effect on CO2 Hypersonic Rarefied Aerodynamic Measurements (2018)
  • Author(s): Ozawa, T., Suzuki, T., and Fujita, K.
  • Organizer: 31th International Symposium on Rarefied Gas Dynamics
  • Int'l Joint Research
• [Presentation] Research on Shock-induced Aerothermodynamics for Future Planetary Explorations (2017)
  • Author(s): Fujita, K., Suzuki, T., Takayanagi, H., Ozawa, T., Nomura, S., Takizawa, N., Matsuyama, S., Lemal, A., and Mizuno, M.
  • Organizer: 31st International Symposium on Shock Waves
  • Int'l Joint Research / Invited
• [Presentation] 二酸化炭素極超音速希薄流における表面熱適応係数計測 (2017)
  • Author(s): 小澤宇志，鈴木俊之，藤田和央
  • Organizer: 第61回宇宙科学技術連合講演会
• [Presentation] 超低高度衛星の希薄空力特性評価に向けた極超音速希薄風洞計測 (2016)
  • Author(s): 小澤宇志，今村俊介，川崎春夫，藤田和央，佐々木雅範
  • Organizer: 第60回宇宙科学技術連合講演会
  • Place of Presentation: 北海道函館市
  • Year and Date: 2016-09-06
• [Presentation] Pitot Pressure Analyses in CO2 Condensing Rarefied Hypersonic Flows (2016)
  • Author(s): Ozawa, T., Suzuki, T., and Fujita, K.
  • Organizer: 30th International Symposium on Rarefied Gas Dynamics 2016
  • Place of Presentation: Victoria, Canada
  • Year and Date: 2016-07-10
  • Int'l Joint Research
• [Presentation] 超低高度衛星の希薄空力特性評価に向けた希薄風洞計測と数値解析 (2016)
  • Author(s): 小澤宇志，今村俊介，川崎春夫，鈴木俊之，藤田和央，佐々木雅範
  • Organizer: 第48回流体力学講演会/第34回航空宇宙数値シミュレーション技術シンポジウム
  • Place of Presentation: 石川県金沢市
  • Year and Date: 2016-07-06
• [Presentation] Investigation of Condensation Effect in CO2 Hypersonic Rarefied Flows (2016)
  • Author(s): Ozawa, T., Suzuki, T., and Fujita, K.
  • Organizer: 54rd Aerospace Sciences Meeting
  • Place of Presentation: San Diego, CA
  • Year and Date: 2016-01-04
  • Int'l Joint Research
• [Presentation] Investigation of Rarefaction and Condensation Effects in Hypersonic Rarefied Flows (2015)
  • Author(s): Ozawa, T., Suzuki, T., and Fujita, K.
  • Organizer: 30th International Symposium on Space Technology and Science
  • Place of Presentation: Kobe-Hyogo, Japan
  • Year and Date: 2015-07-04
  • Int'l Joint Research
• [Presentation] 高クヌーセン数領域における極超音速希薄流数値解析 (2015)
  • Author(s): 小澤宇志，鈴木俊之，藤田和央
  • Organizer: 第47回流体力学講演会/第32回航空宇宙数値シミュレーション技術シンポジウム
  • Place of Presentation: 東京大学生産技術研究所 (東京都目黒区)
  • Year and Date: 2015-07-02