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Three-dimensional unsteady visualization of jet noise generation process using synchronous fluid-acoutic visualization

Research Project

Project/Area Number 21H01529
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 InstitutionThe University of Tokyo

Principal Investigator

Susumu Teramoto  東京大学, 大学院工学系研究科(工学部), 教授 (30300700)

Co-Investigator(Kenkyū-buntansha) 岡本 光司  東京大学, 大学院新領域創成科学研究科, 准教授 (70376507)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,810,000 (Direct Cost: ¥13,700,000、Indirect Cost: ¥4,110,000)
Fiscal Year 2023: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2022: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2021: ¥9,880,000 (Direct Cost: ¥7,600,000、Indirect Cost: ¥2,280,000)
Keywords超音速ジェット / ジェット騒音 / 可視化 / BOS法 / Computed Tomography / ジェット音響 / 空力音響 / ジェット
Outline of Research at the Start

基礎的な流体音響現象であり、航空宇宙工学でも重要性なジェット騒音を対象として、その音源メカニズムの解明のために
○ 独自に開発してきた「音響トリガ条件付き抽出法」に、マイクロホンアレイによる多点音響計測を組み合わせて、音響現象の3次元構造を可視化できるよう進化させる
○ 進化させた「音響トリガ条件付き抽出法」を用いて、高速ジェットの流体現象(大規模乱流構造)から音響現象(音響波)が発生する過程を時系列で3次元的に可視化する
を行う。 音源構造を時系列で3次元的に可視化することにより、ジェット騒音の音源モデルとして提唱されているwavepacketモデルについて直接的な証拠を得ることを目指す。

Outline of Final Research Achievements

To visually clarify the noise generation mechanism of jet noise from supersonic turbulent jets, the three-dimensional structures of both the coherent structure of the turbulent jet shear layer and the near-field sound wave have been successfully visualized. These two phenomena are difficult to visualize with conventional experimental methods due to their high frequency and intermittency.
From the visualization, the correlation between the coherent structure and the far-field sound, as well as the correlation between the near-field sound wave and the circumferential correlation of far-field noise, has been clarified.
The HB-LES method, which can efficiently extract periodic components from unsteady turbulent flow fields, has been proposed. This method has been applied to various flow fields, from canonical flows to unsteady turbulent flows including shock waves. It was confirmed that the method has accuracy comparable to existing methods while greatly improving efficiency.

Academic Significance and Societal Importance of the Research Achievements

実験面では、高周波数かつ間欠的であるため、従来は大規模で高価な計測系が必要だった音源の流れ構造や近傍場の三次元構造と遠方場音の関係を、比較的簡便な計測装置で計測することに成功した。シミュレーション面でも、非定常乱流のシミュレーションについて、従来と同等の精度を保ちつつ、計算速度をストローハル数倍程度向上させることに成功した。
これらの成果により、本研究で取り組んだジェット騒音よりも複雑な、より実用的な高速流の乱流騒音の研究が進展することが期待できる。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • Research Products

    (24 results)

All 2024 2023 2022 2021

All Journal Article (3 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (21 results) (of which Int'l Joint Research: 7 results,  Invited: 1 results)

  • [Journal Article] Formulation and demonstrations of three_dimensional background_oriented schlieren using a mirror for near_wall density measurement2023

    • Author(s)
      Akamine, M., Teramoto, S., and Okamoto, K.
    • Journal Title

      Experiments in Fluids

      Volume: 64:134 Issue: 7 Pages: 133-133

    • DOI

      10.1007/s00348-023-03672-1

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Experimental study on effects of plate angle on acoustic waves from supersonic impinging jets2021

    • Author(s)
      Akamine Masahito、Okamoto Koji、Teramoto Susumu、Tsutsumi Seiji
    • Journal Title

      The Journal of the Acoustical Society of America

      Volume: 150 Issue: 3 Pages: 1856-1865

    • DOI

      10.1121/10.0006236

    • Related Report
      2021 Annual Research Report
  • [Journal Article] Interpretation of Multilobe Wavepackets in Spectral Proper Orthogonal Decomposition of Supersonic Jet2021

    • Author(s)
      Akamine Masahito、Tsutsumi Seiji、Okamoto Koji、Teramoto Susumu、Nonaka Satoshi
    • Journal Title

      AIAA Journal

      Volume: 60 Pages: 1-9

    • DOI

      10.2514/1.j060341

    • Related Report
      2021 Annual Research Report
  • [Presentation] Microphones and Three-dimensional Background-Oriented Schlieren Measurements of an Ideally Expanded Supersonic Jet2024

    • Author(s)
      Akamine, M., Teramoto, S., and Okamoto, K.
    • Organizer
      AIAA Scitech 2024 Forum
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Ray Tracing Analysis of the Sound from a Supersonic Jet Impinging on an Inclined Plate2024

    • Author(s)
      Ichikawa, G., Akamine, M., Teramoto, S., and Okamoto, K.
    • Organizer
      AIAA Scitech 2024 Forum
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] An Investigation on Spatial Resolution in Three-Dimensional Background-Oriented Schlieren Measurement of a Supersonic round Jet2024

    • Author(s)
      Akamine, M., Teramoto, S., and Okamoto, K.
    • Organizer
      International Gas Turbine Congress (IGTC) 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] マッハ波発生現象を対象としたマイクロホンアレイとシュリーレン法による三次元再構成に関する研究2024

    • Author(s)
      澤田祐一郎,岡本光司,赤嶺政仁,寺本進
    • Organizer
      第63回航空原動機・宇宙推進講演会/北部支部2024年講演会/第5回再使用型宇宙輸送系シンポジウム
    • Related Report
      2023 Annual Research Report
  • [Presentation] 斜め平板に衝突する超音速噴流から発生する音響現象へのせん断層内の渦の影響2024

    • Author(s)
      市川豪士,赤嶺政仁,寺本進,岡本光司
    • Organizer
      第63回航空原動機・宇宙推進講演会/北部支部2024年講演会/第5回再使用型宇宙輸送系シンポジウム
    • Related Report
      2023 Annual Research Report
  • [Presentation] Formulation and demonstrations of three-dimensional background-oriented schlieren using a mirror for near-wall density measurements2023

    • Author(s)
      Akamine M., and Okamoto, K.
    • Organizer
      Experiments in Fluids Seminar Series
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 鏡面反射型 3D-BOS 法による超音速衝突ジェットの3次元密度場計測と音響相関解析2023

    • Author(s)
      赤嶺政仁, 長谷川尚也, 橋野渚, 寺本進, 岡本光司
    • Organizer
      第43回流力騒音シンポジウム
    • Related Report
      2023 Annual Research Report
  • [Presentation] 鏡を用いた背景型シュリーレン法による壁面近傍の三次元密度場計測実験2023

    • Author(s)
      赤嶺政仁, 寺本進, 岡本光司
    • Organizer
      日本流体力学会 年会2023
    • Related Report
      2023 Annual Research Report
  • [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
      2023 Annual Research Report
  • [Presentation] 斜め平板に衝突する超音速噴流へのshock leakage理論の適用2023

    • Author(s)
      市川豪士,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
      2023 Annual Research Report
  • [Presentation] Resolvent analysis for compressibility effect on jet share layer2023

    • Author(s)
      Ogawa, D., Teramoto, S., and Okamoto, K
    • Organizer
      Asian Joint Conference on Propulsion & Power (AJCPP)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Extension of a harmonic balance method to the incoming wake effect on the separated boundary layer2023

    • Author(s)
      Shun NAKAMURA, Susumu TERAMOTO, and Koji OKAMOTO,
    • Organizer
      Asian Joint Conference on Propulsion & Power (AJCPP)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Acceleration of Large-Eddy Simulation for Slowly Pulsating Flows Using Harmonic Balance Approach2023

    • Author(s)
      Yuma Iwamoto, Susumu Teramoto, and Koji Okamoto
    • Organizer
      Asian Joint Conference on Propulsion & Power (AJCPP)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A Validation of Three-Dimensional Near-Wall Density Measurement with Background-Oriented Schlieren using Mirror2023

    • Author(s)
      Akamine, M., Teramoto, S., Okamoto, K
    • Organizer
      Asian Joint Conference on Propulsion & Power (AJCPP)
    • Related Report
      2022 Annual Research Report
  • [Presentation] レーザー音響計測法を用いた衝突噴流から生じる複数騒音現象の光学計測2022

    • Author(s)
      権 寧河, 岡本 光司, 赤嶺 政仁, 寺本 進
    • Organizer
      第42回流力騒音シンポジウム
    • Related Report
      2022 Annual Research Report
  • [Presentation] 鏡を用いた背景型シュリーレン法による壁面近傍の三次元密度場計測2022

    • Author(s)
      赤嶺政仁,寺本進,岡本光司
    • Organizer
      日本流体力学会年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] レーザー光と位置検出素子を用いたジェット騒音計測の周波数特性評価に関する研究2022

    • Author(s)
      権寧河,岡本光司,赤嶺政仁,寺本進
    • Organizer
      第54回流体力学講演会 / 第40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] 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2021

    • Author(s)
      赤嶺政仁,岡本光司,寺本進,堤誠司
    • Organizer
      日本航空宇宙学会第61回航空原動機・宇宙推進講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] ウェーブレット変換を用いた超音速噴流から生じるマッハ波の周方向構造の解析2021

    • Author(s)
      田中大貴,岡本光司,寺本進,赤嶺政仁
    • Organizer
      日本航空宇宙学会第61回航空原動機・宇宙推進講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 斜め平板に衝突する超音速噴流から生じる音響現象に関する研究2021

    • Author(s)
      竹本 晃也,寺本進,岡本光司,赤嶺政仁(
    • Organizer
      日本航空宇宙学会第61回航空原動機・宇宙推進講演会
    • Related Report
      2021 Annual Research 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,市川剛士,寺本進,岡本光司
    • Organizer
      第41回流力騒音シンポジウム
    • Related Report
      2021 Annual Research Report

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Published: 2021-04-28   Modified: 2025-01-30  

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