扩散式燃烧器燃烧温度最低，速度衰减快。
For diffusion burner, burning temperature is lowest, attenuation of velocity is quick.
通过理论分析给出了风口速度衰减的经验公式。
The empirical formula for velocity decay was obtained by use of theoretical analysis.
获得了影响回旋气幕形成各主要因素的合理参数以及轴向速度衰减规律。
The reasonable parameters of the convolute air cover and axial speed attenuation rule were found.
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