反切配风对大容量锅炉炉内流场特性影响的研究

通过实验测量和数值模拟研究了大容量锅炉的炉内流场特性。实验测量和数值模拟的结果完全吻合，并得出如下结论：大容量锅炉的炉膛出口存在由残余旋转引起的速度偏差；大容量锅炉的燃烧器区域的实际切圆有贴壁倾向；二次风反切的配风方式可有效降低炉内旋转动量流率矩的水平，并明显削弱了炉膛出口的残余旋转。

The Effect of an Reverse Tangential Air Distribution on the Flow Field Characteristics in a Large-sized Boiler Furnace

The in furnace flow field characteristics of a large sized boiler were studied by way of experimental measurements and numerical simulation. The results of the experimental measurements fully agree with those of numerical simulation. In addition, in both cases the same conclusions have been reached. They are: 1. There exists at the furnace outlet of a large sized boiler a speed excursion caused by a residual rotation; 2. There is a wall attachment tendency in the actual tangential circle at the burner zone of the large sized boiler; and 3. The reverse tangential air distribution mode can effectively reduce the level of rotating momentum flow rate moment in the furnace, and markedly weaken the residual rotation at the furnace outlet.