INFLUENCE OF THE DAMKOHLER NUMBER ON THE AVERAGE THICKNESS OF CONICAL TURBULENT PREMIXED METHANE AIR FLAMES

被引：25

作者：

BOUKHALFA, A

GOKALP, I

机构：

[1] Cent de Recherches sur la Chimie de, la Combustion et des Hautes, Temperatures, Orleans, Fr, Cent de Recherches sur la Chimie de la Combustion et des Hautes Temperatures, Orleans, Fr

来源：

COMBUSTION AND FLAME | 1988年 / 73卷 / 01期

关键词：

AIR; -; Combustion; COMBUSTION; Research; METHANE;

D O I：

10.1016/0010-2180(88)90054-5

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The density field of six open conical turbulent premixed methane/air flames is investigated by Rayleigh scattering. They are stabilized by an annular pilot flame at the rim of a 16 mm diameter brass tube burner. The cold flow turbulence structure is that of fully developed pipe flow. Six combinations of three exit Reynolds numbers and four equivalence ratios give large eddy Damkohler numbers ranging between 9 and 30, and small eddy Damkohler numbers ranging between 0. 80 and 2. 90. Pairs of these flames fall within the wrinkled laminar, corrugated, and thickened flame regimes. Flame heights and average flame thicknesses are deduced from centerline and transverse evolutions of the mean density.

引用

页码：75 / 87

页数：13

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