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Wind Tunnel Experiments on Mass Diffusion in a Street Canyon in Large-Scale Turbulent Flows

Research Project

Project/Area Number 25420117
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Fluid engineering
Research InstitutionToyohashi University of Technology

Principal Investigator

Sekishita Nobumasa  豊橋技術科学大学, 工学(系)研究科(研究院), 准教授 (70283489)

Project Period (FY) 2013-04-01 – 2016-03-31
Project Status Completed (Fiscal Year 2015)
Budget Amount *help
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2013: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Keywords乱流 / せん断流 / 境界層 / 渦 / 流れの制御 / 風環境 / 風洞実験 / 流れの計測
Outline of Final Research Achievements

The present research aims to investing flow structures, the cooling effects of street surface and mass diffusion in a street canyon which is phenomena of air pollution, heat and mass transfer over a street located between buildings. An atmospheric wind tunnel with an active turbulence generator was used for it. (1) For higher turbulence Reynolds number, street surface temperature more drops and atmospheric pollutants more diffuse by turbulent motions. (2) In the case of the building height which is shorter than the street width, cross flows with turbulent motions strongly effect on mass diffusion in the street canyon. (3) In the case of the building height which is almost same as the street width, air pollutants with high density stagnate by circulation flow in the street canyon.

Report

(4 results)
  • 2015 Annual Research Report   Final Research Report ( PDF )
  • 2014 Research-status Report
  • 2013 Research-status Report
  • Research Products

    (7 results)

All 2016 2015 2014 Other

All Presentation (5 results) Remarks (2 results)

  • [Presentation] 都市のストリートキャニオンに関する風洞実験 (排気ガスの拡散機構)2016

    • Author(s)
      関下信正・内方一平・武藤慎太郎
    • Organizer
      日本機械学会2016年度年次大会
    • Place of Presentation
      九州大学
    • Year and Date
      2016-09-11
    • Related Report
      2015 Annual Research Report
  • [Presentation] ストリートキャニオンに関する風洞実験 (加熱ストリート表面の温度分布および流れの観察)2015

    • Author(s)
      関下信正
    • Organizer
      日本機械学会東海支部第64期総会・講演会
    • Place of Presentation
      中部大学
    • Year and Date
      2015-03-14
    • Related Report
      2014 Research-status Report
  • [Presentation] Wind Tunnel Experiments of Exhaust Gas Dispersed in a Street Canyon (Effects of Large-Scale Turbulent Motion)2014

    • Author(s)
      N. Sekishita
    • Organizer
      Annual Conference of Indonesia Society of Mechanical Engineering
    • Place of Presentation
      Indonesia University
    • Year and Date
      2014-10-15
    • Related Report
      2014 Research-status Report
  • [Presentation] 動的乱流発生装置を用いたストリートキャニオンの風洞実験2014

    • Author(s)
      関下信正
    • Organizer
      日本機械学会第2回せん断流研究分科会
    • Place of Presentation
      東洋大学熱海研修センター
    • Year and Date
      2014-05-11
    • Related Report
      2014 Research-status Report
  • [Presentation] ストリートキャニオン内に拡散する排気ガスの風洞実験(大規模乱流中と格子乱流中の比較)2014

    • Author(s)
      関下信正、桝田泰弘
    • Organizer
      日本機械学会東海支部第63期総会・講演会
    • Place of Presentation
      大同大学
    • Related Report
      2013 Research-status Report
  • [Remarks] 豊橋技術科学大学関下研究室

    • URL

      http://wind.me.tut.ac.jp/

    • Related Report
      2015 Annual Research Report
  • [Remarks] 関下研究室

    • URL

      http://wind.me.tut.ac.jp/

    • Related Report
      2013 Research-status Report

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Published: 2014-07-25   Modified: 2019-07-29  

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