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

Yoshisuke Hamamoto; Masaaki Izumi; Eiji Tomita

doi:10.1299/jsmeb1988.32.3_443

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

Yoshisuke Hamamoto, Masaaki Izumi, Eiji Tomita

Graduate School of Natural Science and Technology

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

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, S_T/S_L, is proportional to the value of √1+(2ᾱ /L̄_f )².

Original language	English
Pages (from-to)	443-448
Number of pages	6
Journal	JSME International Journal, Series 2: Fluids Engineering, Heat Transfer, Power, Combustion, Thermophysical Properties
Volume	32
Issue number	3
DOIs	https://doi.org/10.1299/jsmeb1988.32.3_443
Publication status	Published - 1989

ASJC Scopus subject areas

Mechanical Engineering
Physical and Theoretical Chemistry
Fluid Flow and Transfer Processes

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10.1299/jsmeb1988.32.3_443

Cite this

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title = "Turbulent premixed flames in a closed vessel studied through analysis of flame photographs",

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 '{\=L} 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 /{\=L}f )2.",

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year = "1989",

doi = "10.1299/jsmeb1988.32.3_443",

language = "English",

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issn = "1340-8054",

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T1 - Turbulent premixed flames in a closed vessel studied through analysis of flame photographs

AU - Hamamoto, Yoshisuke

AU - Izumi, Masaaki

AU - Tomita, Eiji

PY - 1989

Y1 - 1989

N2 - 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.

AB - 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.

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

Abstract

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