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Coupling Calculation for Radiative and Convective Heat Transfer and Development of Mist Cooling Technology to Prevent Heat Stroke

Research Project

Project/Area Number 21K14087
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 19020:Thermal engineering-related
Research InstitutionYamagata University

Principal Investigator

Gonome Hiroki  山形大学, 大学院理工学研究科, 准教授 (80785551)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2023: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2022: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2021: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords消防装置 / ふく射 / ミスト / 散乱性媒体 / ふく射伝熱 / 対流熱伝達 / 熱中症
Outline of Research at the Start

本研究では、散乱性媒体中のふく射と対流の複合現象を明らかにする。ミスト層のスペクトル選択性と対流場の同時制御技術の確立に取り組む。本研究は、①ふく射伝熱と対流熱伝達のカップリング解析により、ミスト冷却装置における対流現象の解明を目指す。また、②水滴の経時変化に対するスペクトル応答評価により、加熱下のミスト層のふく射遮蔽性能の経時変化を直接測定する。そして、③ふく射吸収量の違いによる対流駆動流動様相可視化により、噴霧ミスト層内に起こる対流場の流動様相を可視化評価する。

Outline of Final Research Achievements

The objective of this study was to realize active control of the flow field and shielding of thermal radiation by water mist. A heat transfer analysis code that can describe the non-gray absorption and non-isotropic scattering characteristics of the scattering medium was established, and a combined convection-radiation heat transfer analysis with water mist was performed. It was shown that the inclusion of mist suppresses the turbulent fluctuation of temperature near the wall and contributes to the suppression of the radiative heat transfer. In addition, water mist spraying experiments were conducted to measure the particle size distribution of water droplets in the mist layer and to experimentally evaluate the radiative shielding performance. The results showed that the radiative shielding rate of the mist layer is dependent on the water droplet diameter, and that a smaller droplet diameter is more effective for radiative shielding.

Academic Significance and Societal Importance of the Research Achievements

ミスト冷却装置は都市環境技術としての用途のみならず、高温環境が日常の製造現場(製鉄所等)での導入が考えられる。高温環境ではふく射伝熱が支配的になるので、それを防ぐ商品を開発し、過酷な環境での労働負荷を軽減できる可能性がある。また、同じくふく射伝熱が支配的になる環境として火災現場が挙げられる。目に見える炎に加え、目に見えない熱ふく射も消火活動において多大な影響を持つ。この熱ふく射による延焼や火傷等を防ぐ消防設備の実現が望まれており、スプリンクラー等の消火設備に本研究知見を応用することでふく射熱遮断機能も持つ防火設備が実現できる。

Report

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

    (12 results)

All 2023 2022 2021 Other

All Journal Article (4 results) (of which Peer Reviewed: 2 results) Presentation (6 results) (of which Int'l Joint Research: 4 results) Remarks (2 results)

  • [Journal Article] 散乱性媒体によるふく射伝熱制御2023

    • Author(s)
      江目 宏樹
    • Journal Title

      伝熱

      Volume: 62 Pages: 8-13

    • Related Report
      2023 Annual Research Report
  • [Journal Article] SPECTRAL TRANSMITTANCE MEASUREMENT OF WATER MIST FROM DUAL FLUID NOZZLE IN INFRARED REGION2023

    • Author(s)
      Hiroki Gonome, Kaito Suzuki, Yuto Takagi, Shuichi Moriya, Junnosuke Okajima, and Takuma Kogawa
    • Journal Title

      Proceedings of the 10th International Symposium on Radiative Transfer, RAD-23

      Volume: -

    • Related Report
      2023 Annual Research Report
  • [Journal Article] Radiative Heat Transfer in Hazardous Fires —Protection from Thermal Radiation by Mist Barriers—2021

    • Author(s)
      江目 宏樹、鷹木 勇人、長尾 太一、小野 泉帆、古川 琢磨、守谷 修一、岡島 淳之介
    • Journal Title

      Earozoru Kenkyu

      Volume: 36 Issue: 3 Pages: 170-175

    • DOI

      10.11203/jar.36.170

    • NAID

      130008102322

    • ISSN
      0912-2834, 1881-543X
    • Year and Date
      2021-09-20
    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Effect of soot on thermal radiation shielding performance of water mist2021

    • Author(s)
      Gonome Hiroki、Takagi Yuto、Nagao Taichi、Ono Mizuho
    • Journal Title

      Fire Safety Journal

      Volume: 123 Pages: 103363-103363

    • DOI

      10.1016/j.firesaf.2021.103363

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] Spectral Shielding Evaluation of Mist for Heat Stroke Prevention against Thermal Radiation from the Ground Surface2023

    • Author(s)
      Hiroki Gonome, Masato Jono, Kaito Suzuki, Shuichi Moriya, Junnosuke Okajima, and Takuma Kogawa
    • Organizer
      The 23rd International Symposium on Advanced Fluid Information (AFI2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Radiation and Convection Coupling Calculation in a Direct Numerical Simulation for Misting Fire Extinguishing Devices2022

    • Author(s)
      H. Gonome, Y. Takagi, K. Suzuki, T. Kogawa, J. Okajima
    • Organizer
      Twenty-second International Symposium on Advanced Fluid Information
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] 火災流動場の能動的制御に向けた散乱性媒体の熱対流解析2021

    • Author(s)
      鷹木勇人, 古川琢磨, 江目宏樹
    • Organizer
      第58回日本伝熱シンポジウム
    • Related Report
      2021 Research-status Report
  • [Presentation] ウォーターミストによる乱流場制御の検討2021

    • Author(s)
      鷹木勇人, 古川琢磨, 岡島淳之介, 江目宏樹
    • Organizer
      日本機械学会熱工学コンファレンス2021
    • Related Report
      2021 Research-status Report
  • [Presentation] Radiation and convection coupling calculation for development of thermal barrier fire extinguishing devices2021

    • Author(s)
      H. Gonome, Y. Takagi, T. Kogawa, and J. Okajima
    • Organizer
      21st International Symposium on Advanced Fluid Information
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Active Control of Thermal-Flow Field by Thermal Radiation in Participating Medium2021

    • Author(s)
      Y. Takagi, T. Kogawa, and H. Gonome
    • Organizer
      18th International Conference on Flow Dynamics
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Remarks] Radiative transfer laboratory

    • URL

      https://gonome-lab.yz.yamagata-u.ac.jp

    • Related Report
      2023 Annual Research Report
  • [Remarks] 江目研究室HP

    • URL

      http://gonome-lab.yz.yamagata-u.ac.jp/research.html

    • Related Report
      2021 Research-status Report

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

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