Flame curvature and preferential diffusion in the burning intensity of bunsen flames

C. K. Law, P. Cho, M. Mizomoto, H. Yoshida

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19 Scopus citations

Abstract

Flame temperature distributions over axisymmetric and two-dimensional Bunsen flames have been experimentally measured for methane, ethylene, and propane mixtures with air, and interpreted on the basis of preferential diffusion and aerodynamic stretching induced by flame curvature. Results substantite the validity of the non-unity Lewis number interpretation of stretched flame phenomena, verify the theoretical prediction that deviations of the flame temperature from the adiabatic flame temperature can occur only in the simultaneous presence of stretch and preferential diffusion, and demonstrate that such a deviation can be correlated by a nondimensional stretch factor for extensive experimental data obtained with various concentrations, flow velocities, and nozzle diameters. Identification of such a correlation strongly suggests the possibility of synthesizing the diverse experimental data on stretched flames in accordance with the generalized expression derived theoretically.

Original languageEnglish (US)
Pages (from-to)1803-1809
Number of pages7
JournalSymposium (International) on Combustion
Volume21
Issue number1
DOIs
StatePublished - 1988
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Mechanical Engineering
  • Physical and Theoretical Chemistry
  • Fluid Flow and Transfer Processes

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