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- W1664692570 abstract "A model for the stability swirling flames is presented. The Zukowski-Marble criteria for flame stability behind bluff bodies is extended to flows exhibiting a recirculation region such as observed in strongly swirling jets. Both the recirculation distance and the effective flame speed are shown to be functions of the swirl parameter, S. An effective turbulent diffusivity relationship is obtained from an extension of the Prandtl mixing length theory and shown to be em = KR(l +/?2S2)1/2£700. By characterizin g the combustion zone as a free shear layer, an effective flame speed is obtained in terms of the diffusivity expression. The stability of the flame is obtained from the blowoff velocity model UBG = K'R •$>($)' V^/OL which is compared with available data. It is concluded that for strongly swirling flows, the principal fluid dynamic variable, 5, controls the process. The limits of applicability are reached when the recirculation zone produced by swirl extends to form a rotating Taylor column." @default.
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- W1664692570 date "1974-01-01" @default.
- W1664692570 modified "2023-10-14" @default.
- W1664692570 title "A Simplified Mixing Length Model of Flame Stability in Swirling Combustion" @default.
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- W1664692570 doi "https://doi.org/10.2514/3.49154" @default.
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