• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Correlation of spatial heterogeneity of fuel vapor concentration and turbulent vortex in evaporating intermittent spray

Research Project

Project/Area Number 04650175
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field Thermal engineering
Research InstitutionThe University of Tokyo

Principal Investigator

AZETSU Akihiko  The University of Tokyo, Faculty of Engineering, Associate Professor, 工学部, 助教授 (80184175)

Project Period (FY) 1992 – 1993
Project Status Completed (Fiscal Year 1993)
Budget Amount *help
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1993: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1992: ¥1,500,000 (Direct Cost: ¥1,500,000)
KeywordsFuel Spray / Evaporating Spray / Exciplex Fluorescence / 2 Dimensional Visualization / Measurement of Turbulence / PIV / Image Analysis
Research Abstract

To explore the correlation of the fuel vapor concentration and the turbulent vortex in evaporating spray, we performed the researches on the spatial heterogeneity of fuel concentration in intermittent fuel spray and the measurement technique of flow velocity by 2D image analysis in parallel.
In the study of the spatial heterogeneity of fuel concentration, the characteristic movements of fuel particles were captured and analyzed through the high speed photography of 2D sectional image of intermittent non evaporating spray, and the new knowledge for the formation process of spray structure was obtained. Through the visualization of fuel vapor concentraition in evaporating spray by the exciplex fluorescence method, the heterogeneity of vapor concentration was characterized. The structure of fuel vapor distribution in evaporating spray is similar to that of droplets distribution in non evaporating spray though the spatial scale is a little bit larger than that in non evaporating one.
In the study of the measurement technique of flow velocity by 2D image analysis, a new course of image analysis technique was examined in particle image velocimetry, PIV.By condensing each particle image information into its gravity center, the calculation of auto-correlation plain was greatly reduced into the comparison of each particle displacing. Analyzing the shape of the second peak of auto-correlation plain obtained in this way, identification of each particle motion can be carried out, and several tens of velocity vectors were extracted within a single interrogation spot. The local turbulent intensity and integral length scale were analyzed from these extracted velocity vectors. By applying this PIV technique to the evaporating spray under the high pressure and high temperature condition, the instantaneous velocity vectors maps were obtained successfully.

Report

(3 results)
  • 1993 Annual Research Report   Final Research Report Summary
  • 1992 Annual Research Report
  • Research Products

    (6 results)

All Other

All Publications (6 results)

  • [Publications] 畦津 昭彦: "瞬時乱流場の2次元画像計測手法に関する研究" 日本機械学会講演論文集. 930-63. 239-241 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 百々 聡: "ディーゼル噴霧の構造とその形成過程に関する研究" 日本機械学会第72期全国大会. (発表予定). (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Akihiko AZETSU: "A Study on 2-D Measurement of Instantaneous Turbulent Field by Image Analysis Technique" Proceedings of JSME. 930-630. 239-241 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Satoshi DODO: "A Study on the Structure of Diesel Spray" Proceedings of JSME. (to be presented). (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 畔津昭彦: "瞬時乱流場の2次元画像計測手法に関する研究" 日本機械学会講演論文集. 930-63. 239-241 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 百々聡: "ディーゼル噴霧の構造とその形成過程に関する研究" 日本機械学会 第72期全国大会. (発表予定). (1994)

    • Related Report
      1993 Annual Research Report

URL: 

Published: 1992-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi