一次风反切系统的数值模拟和多相流动特性分析

四角切圆燃烧锅炉，存在着稳燃和结渣的矛盾，一次风微反切技术已在多台锅炉上得到应用，较好地解决了这对矛盾并能在一定程度上降低ＮＯｘ的排放量。本文把湍流理论和多相流动理论应用于炉内空气动力场的计算机数值模拟，用投影法编制的计算软件对６００ＭＷ锅炉炉内流动进行了计算，得出了一次风反切系统中炉内速度场、实际切圆、颗粒运动轨迹等结果，与冷炉和冷模试验基本吻合，对一次风反切系统的设计和调试具有参考价值。

Prediction on the Flame-stability and Slagging-prevention with Concentric Firing System using Computer-simulation

Using the theories of turbulent flow and multi phase flow,the effects on stabilizing combustion,decreasing flue gas temperature deviation at exit of furnace and easing slagging in furnace with concentric firing system,are obtained.This paper gives the mathematics models,calculation methods and the results.Some useful conclusions can provide reference for design and retrofit of utility boilers.