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Development of 3D-BOS using Mirror for three-dimensional flow field measurement near a wall

Research Project

Project/Area Number 20K14645
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 19010:Fluid engineering-related
Research InstitutionThe University of Tokyo

Principal Investigator

Masahito Akamine  東京大学, 大学院工学系研究科(工学部), 助教 (00835465)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2022: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2021: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords流体計測 / 三次元密度計測 / 3D-BOS / 可視化
Outline of Research at the Start

本研究は,超音速衝突ジェットや衝撃波-境界層干渉など,固体壁面を伴う複雑な流れ場の解明とモデル化に向けて,壁面近くの流れ場の三次元計測を実現する鏡面反射型3D-BOS法を構築し,その計測特性を明らかにする.従来の3D-BOS法では光路方向が限られるため計測が難しかった壁面近くにおいて,壁面を鏡として光路を反射させ,それに応じた光路推定方法と投影モデルを用いることで,三次元計測の実現を目指す.これを実際に,ロケット打上げ時を模擬した超音速衝突ジェットの実験などに適用し,衝撃波の三次元構造の可視化を試みる.

Outline of Final Research Achievements

This study proposed a new measurement method, 3D-BOS using Mirror, that enables three-dimensional density field measurement near a wall, which has been difficult in the past. By using a wall surface as a mirror, the light path from multiple directions, which is necessary for density field reconstruction, can be unobstructed by the wall. The proposed method was formulated as an extension of the conventional 3D-BOS, validated using a virtual model data, and demonstrated using a candle plume near a wall.

Academic Significance and Societal Importance of the Research Achievements

本研究により,3D-BOS法による三次元密度場計測がこれまで困難であった壁面近くの計測が可能となり,適用範囲が拡大した.これにより,例えば遷音速バフェット,衝撃波-境界層干渉,そして衝突ジェットといった様々な壁面近くの流れ場において,衝撃波や剪断層に伴う密度場の計測が期待される.なかでも衝突ジェットの計測は,ロケット打上げ時の騒音発生メカニズムの理解とモデル化につながる.

Report

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

    (7 results)

All 2023 2022 2021 2020

All Presentation (7 results) (of which Int'l Joint Research: 2 results)

  • [Presentation] A validation of three-dimensional near-wall density measurement with background-oriented schlieren using mirror2023

    • Author(s)
      Masahito Akamine, Susumu Teramoto, and Koji Okamoto
    • Organizer
      Asian Joint Conference on Propulsion & Power (AJCPP) 2023
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 超音速ジェット境界の三次元背景型シュリーレン計測の妥当性検討2023

    • Author(s)
      赤嶺 政仁,寺本 進,岡本 光司
    • Organizer
      第55回流体力学講演会/第41回航空宇宙数値シミュレーション技術シンポジウム
    • Related Report
      2022 Annual Research Report
  • [Presentation] An Investigation on Spatial Resolution in Three-Dimensional Background-Oriented Schlieren Measurement of a Supersonic Round Jet2023

    • Author(s)
      Masahito Akamine, Susumu Teramoto, and Koji Okamoto
    • Organizer
      International Gas Turbine Congress 2023
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 超音速適正膨張ジェット境界の三次元密度変動可視化2022

    • Author(s)
      赤嶺 政仁,林 悠游,寺本 進,岡本 光司
    • Organizer
      第42回流力騒音シンポジウム
    • Related Report
      2022 Annual Research Report
  • [Presentation] 間欠移流現象のスペクトル固有直交分解における高次モードの役割2022

    • Author(s)
      赤嶺政仁,寺本進,堤誠司,岡本光司
    • Organizer
      第61回航空原動機・宇宙推進講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] 超音速円形ジェットから生じるスクリーチ現象の多方向同期計測2021

    • Author(s)
      赤嶺政仁,市川豪士,寺本進,岡本光司
    • Organizer
      第41回流力騒音シンポジウム
    • Related Report
      2021 Research-status Report
  • [Presentation] 壁面近傍の流れ場構造のBOS-CT計測について2020

    • Author(s)
      赤嶺政仁
    • Organizer
      令和2年度 宇宙航行の力学シンポジウム
    • Related Report
      2020 Research-status Report

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

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