Aerodynamic Structure of a Laminar Boundary Layer Diffusion Flame over a Horizontal Flat Plate (2nd Report, Experimental Analysis)

Toshihisa Ueda, Akira Ooshima, Naoki Saito, Masahiko Mizomoto

Research output: Contribution to journalArticle

Abstract

Experimental investigations on an aerodynamic structure of a laminar boundary layer diffusion flame over a horizontal flat plate have been performed. Effects of gravitational force and velocity gradient of free stream velocity have been discussed. When a fuel (methane) is injected upward, the velocity around a flame zone is locally accelerated, and the velocity gradient at the wall is increased as compared with that of isothermal flow. On the other hand, when a fuel is injected downward, the velocity is retarded, and the velocity gradient at the wall is decreased in not only a downstream region of the leading flame edge but also the upstream region. This reveals that the gravitational force varies the local pressure distribution not only in a downstream region of the leading flame edge but also in the upstream region. It is also elucidated that the velocity gradient of free steam velocity varies the velocity profiles in a boundary layer.

Original languageEnglish
Pages (from-to)3501-3507
Number of pages7
JournalTransactions of the Japan Society of Mechanical Engineers Series B
Volume56
Issue number531
DOIs
Publication statusPublished - 1990
Externally publishedYes

Keywords

  • Boundary Layer
  • Diffusion Combustion
  • Diffusion Flame
  • Free Stream Acceleration
  • Gravitational Force
  • Laminar Flow
  • Velocity Distribution

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering

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