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The study of flow and reaction rates in turbulent flames
Author(s) -
Barbor R. P.,
Larkin J. D.,
Von Rosenberg H. E.,
Shipman C. W.
Publication year - 1959
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690050110
Subject(s) - turbulence , turbulent diffusion , mechanics , momentum (technical analysis) , combustion , reaction rate , flow (mathematics) , position (finance) , diffusion , thermodynamics , premixed flame , chemistry , classical mechanics , physics , combustor , biochemistry , finance , economics , catalysis
Abstract It is proposed that measurements of reaction rate as a function of position within turbulent flames be the basis of an approach to the problem of turbulent‐flame propagation. As a test of the method, measurements of static pressure, impact pressure, and chemical composition were made at several positions within the burning zones of two simulated ramjet combustion chambers. From these measurements a complete mapping of compositions, velocity components, densities, and static pressures could be carried out. By calculation of the appropriate derivatives of the latter quantities, the differential form of the equation of continuity for the species desired could be solved for net reaction rate as a function of position, turbulent diffusion being neglected. By a similar technique the equation of momentum was used to obtain eddy viscosities. The latter results were used to estimate the effect of turbulent diffusion by assuming a turbulent Schmidt number of unity. It is concluded that the method of attack used is a reasonable approach to the problem of turbulent flame propagation, having a special advantage in that it can be used to discover relationships between the rate of reaction and the patterns of the mean flow.