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Flow field measurement on a moving object surface using cntTSP at low Reynolds numbers

Research Project

Project/Area Number 21H01524
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 InstitutionTohoku University

Principal Investigator

Nagai Hiroki  東北大学, 流体科学研究所, 教授 (70360724)

Co-Investigator(Kenkyū-buntansha) 藤田 昂志  東北大学, 流体科学研究所, 助教 (80774471)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2023: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2022: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2021: ¥10,530,000 (Direct Cost: ¥8,100,000、Indirect Cost: ¥2,430,000)
Keywords低レイノルズ数 / 感温塗料 / 摩擦応力分布 / cntTSP / カーボンナノチューブ / 回転翼 / 非定常 / 境界層遷移 / 低レイノルズ数流れ / 運動する翼
Outline of Research at the Start

本提案では,低レイノルズ数流れにおいて,運動する翼面上の流れのはく離位置,層流/乱流の境界層遷移位置,再付着位置の時空間変化を可視化(検出)する技術を確立することを目的としている.その手段として,カーボンナノチューブを薄膜化したヒータ(cnt)と感温塗料(TSP)を組み合わせたcntTSPをベースとした計測技術に関する研究開発を行うものである.

Outline of Final Research Achievements

The purpose of this proposal is to establish a technique to visualize the position of laminar/turbulent boundary layer transitions, etc., which change the flow over a moving airfoil surface in low Reynolds number flow. For the measurement, cntTSP, a combination of a heater (cnt) with a thin film of carbon nanotubes and a thermosensitive paint (TSP), will be used. We have applied cntTSP to rotor blade surfaces and, measured temperature distributions on rotor blade surfaces in hovering and forward flight conditions, and converted time series images of the temperature distributions into frictional stress distributions. In particular, the formation of the leading edge vortex (LEV) was observed, and proved to be a powerful tool in discussing thrust and torque values.

Academic Significance and Societal Importance of the Research Achievements

本提案では,ドローンなどに代表される回転翼飛行体のロータリーブレード上の流れ場を時系列温度分布の可視化を行うことで解明することを目的としている.そのために,カーボンナノチューブを薄膜化したヒーターを翼表面上に塗布し,流れによる微小な温度変化を増幅し,その温度変化を発光として捕らえる感温塗料技術を組み合わせた.この技術により,回転翼表面上で生じる前縁はく離渦や摩擦応力分布を可視化することができた.この成果により,力計測で得られた推力やトルクの数値を議論する際に流れ場との対比が可能となるためドローなどの飛行体開発において非常に有力なツールになるといえる.

Report

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

    (22 results)

All 2024 2023 2022 2021

All Journal Article (7 results) (of which Peer Reviewed: 7 results,  Open Access: 3 results) Presentation (15 results) (of which Int'l Joint Research: 8 results)

  • [Journal Article] cntTSP visualization technique for rotating blade surface flow at low Reynolds number2024

    • Author(s)
      Ikami Tsubasa、Nishimura Ren、Nagai Hiroki
    • Journal Title

      Experiments in Fluids

      Volume: 65 Issue: 2

    • DOI

      10.1007/s00348-023-03757-x

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Data-driven optimal sensor placement for high-dimensional system using annealing machine2023

    • Author(s)
      Tomoki Inoue, Tsubasa Ikami, Yasuhiro Egami, Hiroki Nagai, Yasuo Naganuma, Koichi Kimura, Yu Matsuda
    • Journal Title

      Mechanical Systems and Signal Processing

      Volume: 188 Pages: 109957-109957

    • DOI

      10.1016/j.ymssp.2022.109957

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Evaluation of the frequency characteristics of cntTSP measurement for unsteady low-speed flow2023

    • Author(s)
      Tsubasa Ikami, Yasufumi Konishi, Hiroki Nagai
    • Journal Title

      Measurement Science and Technology

      Volume: 34 Issue: 6 Pages: 1-11

    • DOI

      10.1088/1361-6501/acb8d0

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Influence of Formulations on Characteristics of Ruthenium-Based Temperature-Sensitive Paints2022

    • Author(s)
      Tsubasa Ikami, Koji Fujita, Hiroki Nagai
    • Journal Title

      Sensors

      Volume: 22 Issue: 3 Pages: 1-14

    • DOI

      10.3390/s22030901

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Data-driven approach for noise reduction in pressure-sensitive paint data based on modal expansion and time-series data at optimally placed points2021

    • Author(s)
      Inoue Tomoki、Matsuda Yu、Ikami Tsubasa、Nonomura Taku、Egami Yasuhiro、Nagai Hiroki
    • Journal Title

      Physics of Fluids

      Volume: 33 Issue: 7 Pages: 077105-077105

    • DOI

      10.1063/5.0049071

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Measurement of boundary layer transition on oscillating airfoil using cntTSP in low-speed wind tunnel2021

    • Author(s)
      Tsubasa Ikami, Koji Fujita, Hiroki Nagai, Daisuke Yorita
    • Journal Title

      Measurement Science and Technology

      Volume: 32 Issue: 7 Pages: 1-11

    • DOI

      10.1088/1361-6501/abe2be

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Investigation of Data Acquisition Conditions for Dynamic Mode Decomposition in Unsteady PSP Measurement2021

    • Author(s)
      IKAMI Tsubasa、FUJITA Koji、NAGAI Hiroki、MATSUDA Yu、EGAMI Yasuhiro
    • Journal Title

      Transactions of the Visualization Society of Japan

      Volume: 41 Issue: 6 Pages: 11-20

    • DOI

      10.3154/tvsj.41.11

    • NAID

      130008059405

    • ISSN
      1346-5260
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Presentation] Surface Flow Measurement in Low-Rotational-Speed Rotor using cntTSP2024

    • Author(s)
      Ren Nishimura, Tsubasa Ikami, Hiroki Nagai
    • Organizer
      AIAA SciTech Forum 2024
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] cntTSPを用いた前進飛行するロータの非定常流れ場構造の可視化2023

    • Author(s)
      伊神翼, 西村練, 永井大樹
    • Organizer
      日本航空宇宙学会 第54期 年会講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 周波数領域におけるPOD基底を用いた非定常PSPデータのノイズ低減2023

    • Author(s)
      伊神翼, 永井大樹, 松田佑, 江上泰広
    • Organizer
      第51回可視化情報シンポジウム
    • Related Report
      2023 Annual Research Report
  • [Presentation] cntTSPを用いた回転翼における表面摩擦応力場の計測2023

    • Author(s)
      伊神翼, 西村練, 永井大樹
    • Organizer
      第19回学際領域における分子イメージングフォーラム
    • Related Report
      2023 Annual Research Report
  • [Presentation] Visualization of Leading Edge Vortex in Low Reynolds Number Rotor by cntTSP2023

    • Author(s)
      Ren Nishimura, Tsubasa Ikami, Hiroki Nagai
    • Organizer
      Twentieth International Conference on Flow Dynamics
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] cntTSPを用いた低レイノルズ数中回転翼に生じる前縁剥離渦の可視化2023

    • Author(s)
      西村練, 伊神翼, 永井大樹
    • Organizer
      第61回飛行機シンポジウム
    • Related Report
      2023 Annual Research Report
  • [Presentation] 低レイノルズ数回転翼に生じる前縁剥離渦のcntTSPによる可視化ーアスペクト比の効果ー2023

    • Author(s)
      伊神翼, 西村練, 永井大樹
    • Organizer
      日本流体力学会 年会2023
    • Related Report
      2023 Annual Research Report
  • [Presentation] 数理最適化を用いた感圧塗料計測データの処理手法2022

    • Author(s)
      窪田航陽, 井上智輝, 伊神翼, 江上泰広, 永井大樹, 松田佑
    • Organizer
      第50回可視化情報シンポジウム
    • Related Report
      2022 Annual Research Report
  • [Presentation] NOISE SUPPRESSION METHOD FOR PSP DATA BASED ON REDUCED-ORDER MODELING2022

    • Author(s)
      T. Inoue, Y. Matsuda, T. Ikami, T. Nonomura, Y. Egami, H. Nagai
    • Organizer
      The 13th Pacific Symposium on Flow Visualization and Image Processing
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] FREQUENCY RESPONSE OF CARBON-NANOTUBE TEMPERATURE-SENSITIVE PAINT2022

    • Author(s)
      T. Ikami, K. Takahashi, Y. Konishi, H. Nagai
    • Organizer
      The 13th Pacific Symposium on Flow Visualization and Image Processing
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] カーボンナノチューブ感温塗料の周波数応答2022

    • Author(s)
      伊神翼, 高橋幸一, 小西康郁, 永井 大樹
    • Organizer
      第54回流体力学講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Sensor Selection Algorithm for Post Processing of PSP Data using Digital Annealer2022

    • Author(s)
      Tomoki Inoue, Tsubasa Ikami, Hiroki Nagai, Yasuhiro Egami, Yasuo Naganuma, Koichi Kimura, Yu Matsuda
    • Organizer
      7TH THERMAL AND FLUIDS ENGINEERING CONFERENCE
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Proposal of a Noise Reduction Method for Pressure-Sensitive Paint Data Using Mathematical Optimization2021

    • Author(s)
      Tomoki Inoue, Yu Matsuda, Tsubasa Ikami, Taku Nonomura, Yasuhiro Egami, Hiroki Nagai
    • Organizer
      18th International Conference on Flow Dynamics
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] DYNAMIC MODE DECOMPOSITION ANALYSIS OF KARMAN VORTEX STRUCTURE MEASURED BY UNSTEADY PSP - INVESTIGATION OF EFFECT OF SAMPLING FREQUENCY ON SPATIO-TEMPORAL FEATURES -2021

    • Author(s)
      Tsubasa Ikami, Koji Fujita, Hiroki Nagai, Yu Matsuda, Yasuhiro Egami
    • Organizer
      19th International Symposium on Flow Visualization
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Response Evaluation of cntTSP for Detection of Dynamic Boundary Layer Transition in Low-Speed Wind Tunnel2021

    • Author(s)
      Tsubasa Ikami, Koji Fujita, Hiroki Nagai, Daisuke Yorita
    • Organizer
      The AIAA Science and Technology Forum and Exposition 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research

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

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