600MW墙式切圆燃烧炉内动力特性数值研究

对辽宁某电厂600MW超超临界墙式切圆燃烧锅炉的炉内动力特性进行数值研究，分析炉内切圆直径大小和炉膛内部流动特性，并将模拟结果与该锅炉冷态试验时测得的数据进行比较。模拟分析得出炉内流场充满度较高，炉膛四角卷吸高温烟气到火焰要部有利于稳定燃烧。燃烧区域的中心形成旋转上升的气流，射流未出现刷墙现象，与冷态实验结果吻合。由于射流刚性较强，旋转上升的气流在到达炉膛出口时仍存在较大的残余旋转，使得炉膛出口存在速度差。该模拟结果能够真实地反映出炉内流动特性，可为该类型锅炉的设计改造提供参考数据。

Numerical Simulation of Dynamic Properties of 600-MW Wall Type Tangentially-Fired Boilers

This paper presents the simulation of the dynamic performance in the furnace of a 600-MW ultra-supercritieal wall type tangentially-fired holler in Liaoning Province. The diameter of the simulated inscribed circle and the dynamic performance of the furnace are studied and the simulation results are then compared with those from cold dynamic testing, which demonstrate its high fullness of the furnace field. Additionally, part of the high-temperature gas reflows back to the base of the flame in the four comers of the furnace, which is conductive to the stability of the combustion flame. Rising rotary air flow is formed in the center of the combustion zone with no primary air jets scouring the furnace wall. These results are fully consistent with the cold dynamic tests. Due to the strong rigidity of the primary air jet, the rising rotary air still has a large amount of residual rotation at the exit of the furnace. Therefore, there exists speed difference at the furnaee exit. The, simulation results can reflect the exact dynamic performance in the furnace and thus prnvide reference datum for the design and innovation of this type of boiler.