Turbulent Flame Velocities in Premixed Sprays Part I. Experimental Study
Turbulent Flame Velocities in Premixed Sprays Part I. Experimental Study
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预混喷雾中的湍流火焰速度第一部分实验研究
DOI：
10.1080/00102207208952297
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发表时间：
1972
影响因子：
1.9
通讯作者：
Takeo Nishjmoto
中科院分区：
文献类型：
--
作者：
Y. Mizutani;Takeo Nishjmoto
摘要 本研究旨在检验预混喷雾中流速、湍流强度、液滴尺寸分布和燃料空气比对湍流火焰速度的影响。煤油或轻柴油的预混合喷雾在长 450 mm、横截面 75 mm × 75 mm 的燃烧室或直径 21.6 mm 的倒锥形火焰燃烧器中燃烧。测量火焰速度，并通过纹影和高速摄影观察火焰的物理结构。结果，得到以下经验关系式，其中 ST 表示湍流火焰速度 [m/sec]，K 是常数，对于煤油喷雾，其值为 6,800，d 是索特平均直径 [微米]，φ 是燃料空气比 [g/g]，u' 是接近流的湍流强度。对于轻柴油喷雾，根据倒锥火焰实验，在 0.1 m/sec 左右的 u' 下，A“ 的值估计为 4,300。从上述关系式可以看出，除了 mi...
Abstract This investigation was conducted to examine the influence of the flow velocity, turbulence intensity, droplet size distribution and fuel-air ratio on the turbulent flame velocities in premixed sprays. Premixed sprays of kerosene or light diesel oil were burnt either in a combustion chamber 450 mm long and of 75 mm × 75 mm cross section, or on an inverted-cone-flame burner of 21.6 mm diameter. The flame velocities were measured, and the physical structure of flames was observed by schlieren and high-speed photographies. As a result, the following empirical relation was obtained where ST denotes the turbulent flame velocity [m/sec], K is a constant whose value is 6,800 for kerosene sprays, d the Sauter mean diameter [microns], φ the fuel-air ratio [g/g] and u' the turbulence intensity of the approach flow. For light diesel oil sprays, the value of A“ was estimated to be 4,300 for u' around 0.1 m/sec from experiments on inverted-cone-flames. It is noticed from the above relation that, besides the mi...