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3D measurement of oil temperature distribution using LIF method and its appication to cavitation phenomena

Research Project

Project/Area Number 21K03915
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 19020:Thermal engineering-related
Research InstitutionUniversity of Yamanashi

Principal Investigator

Funatani Shumpei  山梨大学, 大学院総合研究部, 准教授 (50607588)

Co-Investigator(Kenkyū-buntansha) 坂間 清子  国立研究開発法人産業技術総合研究所, 情報・人間工学領域, 研究員 (70773539)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2022: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2021: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
KeywordsLIF / 可視化計測 / 温度計測 / ミッションオイル / 温度分布計測
Outline of Research at the Start

(1)親油性蛍光体を用いた温度分布可視化計測システムを開発し、作動油内の温度分布の高精度・高解像度・温度計測技術を確立する。
(2)上記温度分布可視化計測システムを用いた作動油の気泡断熱圧縮現象の液相部の気泡径、界面位置(界面形状)の時間変化、温度分布、速度分布計測を行い、数値解析の妥当性を検証する。
(3)作動油の酸化劣化を抑制できる設計条件について提案する。

Outline of Final Research Achievements

In this study, we succeeded in visualizing and measuring the temperature rise phenomenon caused by acoustic cavitation in automotive transmission oil using a two-color LIF method for transmission oil originally developed using Pirromethene597, and confirmed that cavitation causes a local temperature rise in transmission oil. The measured temperature rise was about 10.5°C. However, the measured temperature rise of about 10.5°C was not significant. However, the measured temperature increase of approximately 10.0 °C cannot be said to be a factor affecting the physical properties of the transmission oil, and an estimate of the maximum temperature around bubbles due to bubble collapse has not yet been achieved.

Academic Significance and Societal Importance of the Research Achievements

我が国におけるエネルギー消費量の70%超が産業、運輸部門における商品である。これらの部門では、建設機械を筆頭に、種々の油圧制御機構(油圧シリンダ、変速機など)が用いられており、これらサブシステムによるエネルギー損失は、機械駆動時のエネルギー損失の約70%に達する。このエネルギー損失の主要因の一つが、キャビテーションにおける気泡断熱圧縮による作動油の酸化劣化とラッカー(酸化縮合物)生成である。このキャビテーションならびに気泡断熱圧縮においては、気泡が崩壊する瞬間に微小な高温高圧領域が生じることが指摘されているが実測されておらず、この現象解明の意義は大きい。

Report

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

    (5 results)

All 2024 2023 2022

All Journal Article (4 results) (of which Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (1 results)

  • [Journal Article] Improvement of Temperature Measurement Accuracy of Hot Airflow Using Ultrafine Thermo-Sensitive Fluorescent Wires of Lumisis Phosphor2024

    • Author(s)
      Funatani Shumpei、Tsukamoto Yusaku
    • Journal Title

      Sensors

      Volume: 24 Issue: 8 Pages: 2510-2510

    • DOI

      10.3390/s24082510

    • Related Report
      2023 Annual Research Report
  • [Journal Article] Theoretical formulation of streak failure conditions and numerical investigation to optimize the illumination code of particle streak velocimetry2023

    • Author(s)
      Tsukamoto Yusaku、Funatani Shumpei
    • Journal Title

      Journal of Visualization

      Volume: 26 Issue: 6 Pages: 1359-1374

    • DOI

      10.1007/s12650-023-00940-4

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Development of a Temperature Distribution Measurement System for Transmission Oil for Transportation Equipment2023

    • Author(s)
      Funatani Shumpei、Takei Ryoga、Tsukamoto Yusaku
    • Journal Title

      Sensors

      Volume: 23 Issue: 12 Pages: 5499-5499

    • DOI

      10.3390/s23125499

    • Related Report
      2023 Annual Research Report
  • [Journal Article] Temperature Measurement of Hot Airflow Using Ultra-Fine Thermo-Sensitive Fluorescent Wires2022

    • Author(s)
      Shumpei Funatani, Yusaku Tsukamoto, Koji Toriyama
    • Journal Title

      Sensors

      Volume: 22 Issue: 9 Pages: 3175-3175

    • DOI

      10.3390/s22093175

    • Related Report
      2022 Research-status Report 2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] トランスミッションオイル内キャビテーションの温度分布計測による非接触温度分布可視化技術の実証実験2023

    • Author(s)
      塩澤龍一、舩谷俊平
    • Organizer
      日本機械学会 山梨講演会2023
    • Related Report
      2023 Annual Research Report

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

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