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

1993 Fiscal Year Final Research Report Summary

Group Combustion and Detailed Flame Structure of Liquid Fuel Spray Under the Infulence of Eddies

Research Project

Project/Area Number 04452148
Research Category

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

Allocation TypeSingle-year Grants
Research Field Thermal engineering
Research InstitutionOsaka University

Principal Investigator

MIZUTANI Yukio  Osaka University, Faculty of Engineering, Professor, 工学部, 教授 (80028993)

Co-Investigator(Kenkyū-buntansha) NAKABE Kazuyoshi  Osaka University, Faculty of Engineering, Research Associate, 工学部, 助手 (80164268)
AKAMATSU Fumiteru  Osaka University, Faculty of Engineering, Research Associate, 工学部, 助手 (10231812)
KATSUKI Masashi  Osaka University, Faculty of Engineering, Asistant Professor, 工学部, 助教授 (20029292)
Project Period (FY) 1992 – 1993
KeywordsLiquid Fuel / Combustion Phenomena(3) / Laser, Group Combustion / Light Emission / Mie-Scattering / Spectral Analysis / Wake / PDA, LDV
Research Abstract

(1) A spray flame has inevitably a complicated structure due to grouping behavior of droplets and preferential flame propagation through the mixture of air and fuel vapor from droplets. In order to observe the detailed structure of spray flames, the light emissions in OH and CH bands, and the laser light scattered by droplets were monitored simultaneously and analyzed spectrally in the flame of a premixed spray stabilized by an annular hydrogen pilot flame. The diameter and velocity of droplets in the flame were also monitored using a phase Doppler anemometer (PDA). It was confirmed experimentally that the combustion reaction occurred first in the intercluster regions by the preferential flame propagation through the fuel vapor from droplets, and then, as the droplet number density of clusters decreased along the stream line, the combustion zone gradually moved into the clusters, and eventually dense small subclusters or single droplets burned in the diffusion combustion mode.
(2) A circular rod was inserted in a spray flame stabilized by an annular hydrogen diffusion pilot flame to investigate the detailed structure of the spray flame under the influence of wake flow behind the rod. The light emissions in OH and CH bands, and the laser light scattered by droplets were monitored simultaneously and analyzed spectrally in the flame with and without the rod. The droplet velocity was also monitored using a laser Doppler velocimeter (LDV). It was confirmed experimentally that the inserted rod promoted the reduction of the length scale of droplet clusters and the flame propagation into the clusters with solid-body light emission. This result suggests that the combustion behavior of the clusters was influenced by the turbulent mixing and slip velocity between gas and droplets due to the wake flow behind the rod.

  • Research Products

    (8 results)

All Other

All Publications (8 results)

  • [Publications] 中部主敬,水谷幸夫,藤岡博之,赤松史光: "分光可視化画像処理による噴霧火炎の構造観察" 日本機械学会論文集,58-546B(1992),635.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kazuyoshi NAKABE,Yukio MIZUTANI,Hiroyuki FUJIOKA,Fumiteru AKAMATSU,: "Simultaneous Visualization of Droplet Clusters,Chemiluminescence and Spectral Luminosity in Spray Flames" Atomization and Sprays. (掲載予定).

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 赤松史光,水谷幸夫,香月正司,中部主敬,岡康浩,井本泰造: "円柱により保炎された噴霧流の集合燃焼挙動" 日本機械学会関西支部第251回講演会講演論文集,No.924-5(1992),102.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 赤松史光,水谷幸夫,中部主敬,香月正司,田端敏克: "予混合噴霧流の集合燃焼挙動" 第7回流れの計測大阪シンポジウム講演要旨集 Vol.11,No.15(1993),45.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 赤松史光,中部主敬,水谷幸夫,香月正司,田端敏克: "予混合噴霧流の集合燃焼挙動" 第31回燃焼シンポジウム講演論文集,(1993),174.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] F.Akamatsu,K.Nakabe,Y.Mizutani and M.Katsuki: "Group Combustion Behavior of Droplets in a Premixed Spray Flame" ICLASS-94. (発表予定).

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.NAKABE, Y.MIZUTANI, F.AKAMATSU and H.FUJIOKA: "Observation of Droplet Group Combustion in terms of Simultaneous Measurement of Mie-Scattering and Spectral Luminosity from Spray Flames" International Journal of Atomization and Sprays. (to be published).

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] F.AKAMATSU, K.NAKABE, Y.MIZUTANI, and M.KATSUKI: "Group Combustion Behavior of Droplets in a Premixed Spray Flame" ICLASS94. (to be presented).

    • Description
      「研究成果報告書概要(欧文)」より

URL: 

Published: 1995-03-27  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi