Study on Hysteresis Characteristics of Axial-injection End-burning Hybrid Rockets under Throttling Operation

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  • Kimino Masaya
    連絡先著者（Corresponding author）：masaya_kimino@eis.hokudai.ac.jp 北海道大学大学院工学院機械宇宙工学専攻
  • Saito Yuji
    東京大学大学院新領域創成科学研究科
  • Okutani Yushi
    北海道大学大学院工学院機械宇宙工学専攻
  • Tsuji Ayumu
    北海道大学大学院工学院機械宇宙工学専攻
  • Soeda Kentaro
    東京大学大学院理学系研究科付属フォトンサイエンス研究機構
  • Nagata Harunori
    北海道大学大学院工学研究院

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Other Title
  • 端面燃焼式ハイブリッドロケットの推力制御時におけるヒステリシス特性に関する研究
  • タンメン ネンショウシキ ハイブリッドロケット ノ スイリョク セイギョジ ニ オケル ヒステリシス トクセイ ニ カンスル ケンキュウ

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<p>In this study, the authors conduced ten firings to investigate a hysteresis characteristics in Axial-Injection End-Burning hybrid rockets under throttling operation. Oxidizer mass flow rate and chamber pressure were throttled by two methods, actuating valves in a fluid circuit consisting of two oxidizer supply lines and a motor controlling. Chamber pressure and oxidizer mass flow rate were measured during each firing. The results show that two types of hysteresis characteristics were observed when throttling operation is repeated. One is a hysteresis with respect to increase and decrease of the oxidizer mass flow rate. Another is a hysteresis for the cycle. It is considered that the former hysteresis has the influence of a chamber pressure response time. In addition, the latter hysteresis is not necessarily observed even in the same chamber pressure region. </p>

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