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Development of Doppler Global Velocimetry using a DPSS laser

Research Project

Project/Area Number 23560198
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Fluid engineering
Research InstitutionNagasaki University

Principal Investigator

SAKAGUCHI Daisaku  長崎大学, 工学(系)研究科(研究院), 准教授 (70244035)

Project Period (FY) 2011 – 2013
Project Status Completed (Fiscal Year 2013)
Budget Amount *help
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2012: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2011: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywordsレーザー / ドップラー効果 / 流体計測 / レーザ計測 / 三次元流れ
Research Abstract

DGV (Doppler Global Velocimetry) with a DPSS (Diode-Pump Solid State) laser is successfully developed in this research. DGV is a system to measure velocity of particles crossing a laser sheet, by analizing the scattered doppler shifted frequency of a light sheet. The light frequency shift is very weak because of the very low speed of the particles compared to the speed of light. In order to overcome this problem, an absorption line of the molecular iodine was used. The frequency shift as a function of the absorption line of the iodine cell can be traced back to particle velocity. The optical setup with the DPSS laser and the iodine cell was developed in this research and measurement accuracy of the velocity field from the rotating disc was confirmed. It is found that the DPSS laser is suitable laser source for DGV system because of its high stability and narrow line width, as a result, high measurement accuracy is obtained by this system.

Report

(4 results)
  • 2013 Annual Research Report   Final Research Report ( PDF )
  • 2012 Research-status Report
  • 2011 Research-status Report
  • Research Products

    (2 results)

All 2014

All Presentation (2 results)

  • [Presentation] 半導体励起固体レーザを用いたドップラーグローバル流速計システムの構築2014

    • Author(s)
      坂口大作,谷尾優樹,壽智史,村上京士郎
    • Organizer
      日本機械学会九州支部第70期総会・講演論文集
    • Place of Presentation
      (査読無,Paper No.131, pp.1-2)
    • Related Report
      2013 Final Research Report
  • [Presentation] 半導体励起固体レーザを用いたドップラーグローバル流速計システムの構築2014

    • Author(s)
      坂口大作,谷尾優樹,壽智史,村上京士郎
    • Organizer
      日本機械学会九州支部第70期総会・講演会
    • Place of Presentation
      九州工業大学(福岡県北九州市戸畑区)
    • Related Report
      2013 Annual Research Report

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Published: 2011-08-05   Modified: 2019-07-29  

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