【摘要】 <正> 一、引言 旋流式煤粉预燃室作为一种新型粉煤燃烧器,在降低电站锅炉点火用油,提高煤粉锅炉的低负荷稳燃性能等方面发挥了显著的怍用.旋流式煤粉预燃室合理地组织了旋转射流、环形射流,有其独特的结构和配风方式,其稳燃机理尚不完全清楚.本文作者则在预燃室冷态流动模型上用温度示踪方法试验研究了有根部风的改进型预燃室内气流的混合过程,并用三孔测速探针测量了筒内八个断面上的轴向和切向速度分布,对预燃室内部更多还原

【Abstract】 In this paper, the conservation equation of gas species mixture fraction was established in the streamwise-streamspan cartesian coordinate. By using the measured time-mean values of areodynamic flow and mixing data, the turbulent-exchange-coefficients were obtained by means of back-calculation. The result can be used for comparison with mathematical modelling results.更多还原