Turbulent premixed flames in a closed vessel studied through analysis of flame photographs

Yoshisuke Hamamoto, Masaaki Izumi, Eiji Tomita

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Abstract

The characteristics of roughness of a turbulent flame front in a disc-type combustion chamber were determined through high-speed schlieren photography and image analysis. The correlations between the characteristics of flame-front roughness and the turbulence characteristics or the turbulent burning velocity were discussed. The main results were as follows: (1) The RMS value 'ᾱ ' and the integral scale 'L̄ f' of the flame-front roughness are strongly influenced by the intensity and the integral spatial scale of turbulence. (2.) The shape of the power spectrum of flame-front roughness is similar to that of the power spectrum of turbulent flow, and the microscale of the flame-front roughness is nearly equal to the Taylor microscale of turbulence. (3) The ratio of turbulent burning velocity to laminar burning velocity, ST/SL, is proportional to the value of √1+(2ᾱ /L̄f )2.

Original languageEnglish
Pages (from-to)443-448
Number of pages6
JournalJSME International Journal, Series 2: Fluids Engineering, Heat Transfer, Power, Combustion, Thermophysical Properties
Volume32
Issue number3
Publication statusPublished - Aug 1989

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ASJC Scopus subject areas

  • Engineering(all)

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