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在锅炉炉膛中加入反切三次风可改变炉膛出口过热器前端的冲刷程度以及流场结构。针对这个问题，作者用ＳＩＭＰＬＥＳＴ算法对三维空间四角射流的等温流场中加入反切风后的影响进行了数值研究。在改变流速、流量和反切风给风高度等参数的情况下，得到不同参数下的等压线、等速线以及矢量场图和数据库，对结果进行了分析、比较，得出合理的配置反切风，可以较好地平衡炉膛出口的气流，随反切风给风高度的增加，需要的反切风速减小；加入反切风后，反切风下游形成中心正旋、四角反旋的流动结构。图１７表１参９
Addition of counter-cutting tertiary air in the boiler hearth can change the flushing degree of the front end of the superheater at the outlet of the hearth and the structure of the flow field. To solve this problem, the author uses SIMPLEST algorithm to study the influence of anti-cutting wind on isothermal flow field of four-dimensional jets in three-dimensional space. Under the condition of changing the parameters such as the flow velocity, the flow and the height of the wind on the back-cutting wind, the isobaric lines, the constant velocity lines and the vector field graphs and databases under different parameters were obtained. The results were analyzed and compared to find the reasonable configuration The wind can balance the air flow at the outlet of the furnace well. With the increase of the height of the wind on the back-cutting wind, the required reverse wind speed is reduced. After the anti-cutting wind is added, the anticlockwise flow structure is formed at the center of the counter-cutting wind. Figure 17 Table 1 参 9