• 研究課題をさがす
  • 研究者をさがす
  • KAKENの使い方
  1. 課題ページに戻る

2022 年度 実績報告書

亜酸化窒素を酸化剤とするハイブリッドロケット用再生冷却グラファイトノズルの研究

研究課題

研究課題/領域番号 22F22757
配分区分補助金
研究機関北海道大学

研究代表者

永田 晴紀  北海道大学, 工学研究院, 教授 (40281787)

研究分担者 GALLO GIUSEPPE  北海道大学, 工学(系)研究科(研究院), 外国人特別研究員
研究期間 (年度) 2022-11-16 – 2025-03-31
キーワードHybrid rocket / Nozzle erosion / Regenerative cooling
研究実績の概要

In the framework of the project, experimental and numerical apparatus have been developed for the study of the implementation of a regenerative cooling system in hybrid rocket engines for the nozzle erosion suppression. The investigators demonstrated in this first half year that this novel technology is possible and improves the performance of the propulsion system. Many experimental tests have been carried out and no nozzle erosion was observed in the tests, despite the considered configuration is extremely affected by this phenomenon when active cooling is not implemented. In addition, accurate numerical models have been developed for the study and the prediction of the motor operating conditions. These models give an insight in the multiphase physics occurring inside the cooling channels. These models allow the prediction of the nozzle temperature and hence, the occurrence of the nozzle erosion. Finally, the numerical results have been compared with the experimental ones in order to assess their validity. In this framework, two papers were obtained and submitted to two high quality Q1 journals.

現在までの達成度 (区分)
現在までの達成度 (区分)

2: おおむね順調に進展している

理由

As written in the proposal, the investigation will be performed step-by-step. Currently, we have started with a safe oxidizer, such as liquid oxygen. These preliminary results allowed us to understand the capability of the current technology to suppress nozzle erosion. The numerical models are also in line with the current literature and a good assessment with the experimental was also found. Summing up, we can clearly state that our results are going as originally planned because: 1. Nozzle erosion was suppressed by the proposed technology; 2. The motor reliability is increased because the heat fluxes provided by the combustion chamber were self-handled by the motor.

今後の研究の推進方策

In the next future, we are going to use decomposing oxidizers, which may be hazardous in this kind of application. Indeed, when these oxidizers are heated, they can decompose leading to motor failure. For safety reasons, firstly the investigators will proceed with using 60% hydrogen peroxide, then the proposed oxidizer, which is nitrous oxide in a self-pressurized fashion. This final task will lead to two benefits to rocket science: the demonstration of the feasibility of using regenerative cooling in hybrid rocket engines (nothing is present in literature) and the further understanding of the nitrous oxide behaviour in heating environments, such as cooling channels.

  • 研究成果

    (2件)

すべて 2023 2022

すべて 学会発表 (2件) (うち国際学会 2件)

  • [学会発表] Regenerative Cooling of Graphite Nozzles for Throat Erosion Suppression2023

    • 著者名/発表者名
      Hiroki Kojima, Landon T. Kamps, Yuki Nobuhara, Giuseppe Gallo and Harunori Nagata
    • 学会等名
      AIAA SCITECH 2023 Forum
    • 国際学会
  • [学会発表] One-Dimensional Model for the Study of Helical Cooling Channels Based on Cryogenic Oxygen in Hybrid Rocket Engines2022

    • 著者名/発表者名
      Giuseppe Gallo, Shota Hirai, Landon Kamps, Harunori Nagata
    • 学会等名
      19th International Conference on Flow Dynamics (ICFD2022)
    • 国際学会

URL: 

公開日: 2023-12-25  

サービス概要 検索マニュアル よくある質問 お知らせ 利用規程 科研費による研究の帰属

Powered by NII kakenhi