• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Improvement of the pulse-detonation technology by shortening of the run-up distance and speeding up of the propagation

Research Project

Project/Area Number 20H02352
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 InstitutionHiroshima University

Principal Investigator

ENDO Takuma  広島大学, 先進理工系科学研究科(工), 教授 (00211780)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000)
Fiscal Year 2022: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2021: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000)
Fiscal Year 2020: ¥6,630,000 (Direct Cost: ¥5,100,000、Indirect Cost: ¥1,530,000)
Keywordsデトネーション / 発生 / 伝播 / 衝撃波 / 火炎加速
Outline of Research at the Start

パルスデトネーション(PD)技術を高度化するため、次の2項目について研究を行う。
研究項目①:デトネーション発生のための助走距離を短縮させる技術
研究項目②:デトネーションを定常伝播状態よりも平均として高速で伝播させる技術
両者とも新技術の創出であり、静止予混合ガスによる基礎実験の後、流動ガスによる単一パルス実験と連続運転実験を行って実用可能性の検証まで行う。①によってPD装置は小型化され、②によってデトネーションの既燃ガスが高温化される。具体的な目標は、①に関しては助走距離の半減であり、②に関しては平均伝播速度の10%向上である。

Outline of Final Research Achievements

A technology that shortens the deflagration-to-detonation transition (DDT) run-up distance and a technology that effectively accelerates a non-stationary detonation were experimentally studied. On the former, we found out a phenomenon that a flame is remarkably accelerated just passing through a T-shaped bifurcation, and studied this phenomenon in detail. In some cases, DDT occurred just downstream of the T-shaped bifurcation as a result of the flame acceleration there. Concludingly, we obtained a very important knowledge on the flame acceleration and DDT. On the latter, we studied the influences of a single small obstacle on the detonation cellular structure, and published the results. However, the effective acceleration of a non-stationary detonation by successive small obstacles was not successful because the tentative deceleration just downstream of each obstacle was more significant than the expectancy whereas the acceleration occurred after the deceleration as expected.

Academic Significance and Societal Importance of the Research Achievements

本研究は、流路内の燃焼波に流路形状が及ぼす影響に関するものである。過去のデトネーションと流路内障害物との相互作用に関する研究では障害物がセル幅(デトネーション波面の特性長)よりも大きな場合を扱っていたが、本研究ではセル幅よりも小さな障害物を扱った。これは新たな視点の研究であり、学術的に意義深い。さらに、これまでよりも現実的な流路内障害物を模擬しており、安全の視点から社会的にも意義深い。また、本研究では火炎がT字分岐を通過するだけで火炎加速と、条件によってはデトネーションへの遷移が起こることを見出しており、学術的にも安全という視点から社会的にも、基礎的な実験の成果として大きな意義を持つ。

Report

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

    (10 results)

All 2023 2022 2021

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (9 results) (of which Int'l Joint Research: 2 results,  Invited: 2 results)

  • [Journal Article] Influences of a small obstacle on the sidewall upon a detonation cellular structure2023

    • Author(s)
      Yoko SEKI, Wookyung KIM, Tomoyuki JOHZAKI, and Takuma ENDO
    • Journal Title

      Journal of Thermal Science and Technology

      Volume: 18 Issue: 1 Pages: 23-00038-23-00038

    • DOI

      10.1299/jtst.23-00038

    • ISSN
      1880-5566
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] T字分岐における火炎加速とデトネーション起爆2023

    • Author(s)
      本田朝暉,喜田祐介,金佑勁,城﨑知至,遠藤琢磨
    • Organizer
      2022年度衝撃波シンポジウム
    • Related Report
      2022 Annual Research Report
  • [Presentation] Influences of a small step on the side wall on detonation propagation2022

    • Author(s)
      Yoko Seki, Tomoaki Honda, Wookyung Kim, Tomoyuki Johzaki, and Takuma Endo
    • Organizer
      28th International Colloquium on the Dynamics of Explosions and Reactive Systems
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Comparison between Laser Ignition and Spark-Plug Ignition of Flowing Propane-Air Mixtures2022

    • Author(s)
      Kosuke Eto, Yusaku Kojima, Wookyung Kim, Tomoyuki Johzaki, and Takuma Endo
    • Organizer
      28th International Colloquium on the Dynamics of Explosions and Reactive Systems
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 高周波数パルスデトネーション技術の溶射への応用2022

    • Author(s)
      遠藤琢磨
    • Organizer
      溶射学会第115回(2022年度春季)全国講演大会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 側壁上の擾乱が生み出すデトネーション波の乱れ2022

    • Author(s)
      関陽子,本田朝暉,金佑勁,城﨑知至,遠藤琢磨
    • Organizer
      第54回流体力学講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 高速流動気体中でのレーザー点火の点火・燃焼特性2022

    • Author(s)
      江藤滉祐,金佑勁,城﨑知至,遠藤琢磨
    • Organizer
      第54回流体力学講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 側壁上の小さい擾乱がデトネーション波のセル構造に与える影響2022

    • Author(s)
      関陽子,本田朝暉,金佑勁,城﨑知至,遠藤琢磨
    • Organizer
      2021年度衝撃波シンポジウム
    • Related Report
      2021 Annual Research Report
  • [Presentation] 流動気体中でのレーザー点火と火花点火の点火・燃焼特性2021

    • Author(s)
      江藤滉祐,小島優作,金佑勁,城﨑知至,遠藤琢磨
    • Organizer
      第53回流体力学講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] デトネーション管の1次元理論とパルスデトネーション技術2021

    • Author(s)
      遠藤琢磨
    • Organizer
      2020年度衝撃波シンポジウム
    • Related Report
      2020 Annual Research Report
    • Invited

URL: 

Published: 2020-04-28   Modified: 2024-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi