Heat flux from turbulent premixed flame to the wall of a constant volume vessel

Eiji Tomita, Yoshisuke Hamamoto, Hiroshi Sasaki

Research output: Contribution to journalArticle

Abstract

Instantaneous heat flux to the wall of a combustion chamber was measured by a co-axial thermocouple with a thin film junction for the case with laminar and turbulent flame of a propane-air mixture. The experiment was performed in a constant volume vessel of the disk-type with swirl flow. When the laminar flame arrived at the wall, the heat flux had one sharp peak. In the case of the turbulent flame, however, the heat flux with multiple sharp peaks was observed. It is considered that this phenomenon corresponds to the structure of the turbulent flame. The maximum value of peak heat flux, qmax is approximately proportional to {k(Ti-Tu)/δL}0.61, where (Ti-Tu)/δL is a characteristic value of the temperature gradient in a preheat zone of laminar flame and k is the heat conductivity. The same relation is obtained, even when the flow velocity, equivalence ratio or measuring position are varied.

Original languageEnglish
Pages (from-to)1229-1233
Number of pages5
JournalNippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume55
Issue number512
Publication statusPublished - Apr 1989
Externally publishedYes

Fingerprint

turbulent flames
premixed flames
vessels
Heat flux
heat flux
thermocouples
combustion chambers
Combustion chambers
Thermocouples
Propane
propane
Flow velocity
Thermal gradients
equivalence
Thermal conductivity
temperature gradients
flow velocity
Thin films
heat
conductivity

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

Heat flux from turbulent premixed flame to the wall of a constant volume vessel. / Tomita, Eiji; Hamamoto, Yoshisuke; Sasaki, Hiroshi.

In: Nippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B, Vol. 55, No. 512, 04.1989, p. 1229-1233.

Research output: Contribution to journalArticle

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