Observation of the boundary layer combustion flame of hybrid rocket

• Project/Area Number: 26820369
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Aerospace engineering
• Research Institution: Chiba Institute of Technology (2015); Akita University (2014)
• Principal Investigator: Wada Yutaka 千葉工業大学, 惑星探査研究センター, 上席研究員 (20553374)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2015: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000); Fiscal Year 2014: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
• Keywords: ハイブリッドロケット / 低融点燃料 / 高燃料後退速度 / 燃焼火炎観察 / 燃焼機構 / 低融点熱可塑性樹脂 / 境界層火炎 / 境界層燃焼火炎

Outline of Final Research Achievements

Hybrid rocket system is one of the most prospective next-generation space propulsion systems having low cost, high safety ability and green characteristics. High regression rate hybrid rocket fuel have been necessary for the large motor design. Low melting temperature fuel (LT fuel) such as a wax, was focused as high regression rate fuel. Small droplets of the liquefied fuel popping out from the burning surface of LT fuel were observed directly using slab motor at the atmosphere condition. However, the detail mechanism of small droplets generation is not known well. In this study, the double slab motor with observation windows for high pressure experiment was prepared and flame observation was succeeded using this experimental setup. Combustion flame of inert polymer fuel and low melting pint polymer fuels were observed and compared using CMOS camera and high speed camera at the high combustion pressure.

Research Products

• [Journal Article] COMBUSTION AND PERFORMANCE STUDIES OF GLYCIDYL AZIDE POLYMER AND ITS MIXTURES AS HYBRID ROCKET FUEL (2015)
  • Author(s): Po-Jul Chang, Yutaka Wada, Akshay Garg, Hedeo Nakamura, Motoyasu Kimura, Keiichi Hori
  • Journal Title: International Journal of Energetic Materials and Chemical Propulsion Volume: 14 Pages: 221-239
  • Peer Reviewed / Int'l Joint Research
• [Presentation] ハイブリッドロケット燃料の境界層燃焼火炎観察法 (2015)
  • Author(s): 川又優也, 川端洋, 板垣智紀, 新中崎浩太郎, 加藤隆一, 和田豊
  • Organizer: 日本航空宇宙学会北部支部2015 年講演会ならびに第16回再使用型宇宙推進系シンポジウム
  • Place of Presentation: 秋田県能代市
  • Year and Date: 2015-03-16 – 2015-03-17
• [Presentation] Observation of combustion behavior of low melting temperature fuel for hybrid rocket using double slab motor (2014)
  • Author(s): Yutaka Wada, Keisuke Seki, Nobuji Kato, Keiichi Hori
  • Organizer: 10th International Symposium on Special Topics in Chemical Propulsion (10-ISICP)
  • Place of Presentation: フランスポアティエ
  • Year and Date: 2014-06-02 – 2014-06-06