220t/h锅炉冷态数值试验研究

Numerical Experimental Study of the Cold State of a 220 t/h Boiler

针对锅炉传统冷、热态性能试验存在的局限性,以220t/h四角切圆燃烧锅炉为原型,建立其可实现的k-ε数学模型,结合锅炉冷态性能试验,利用计算流体力学软件Fluent模拟炉内空气动力场。数值模拟结果与冷态试验结果的基本一致性和两种结果分布趋势的较好吻合性说明该数值模拟方法能较好地反映炉内真实的流场特性,验证了所建数学模型的正确性及可靠性,为进一步完善锅炉冷态性能试验和进行热态数值试验提供更全面的数据信息。

With a 220 t/h tangentially corner-fired boiler serving as a prototype, a realizable k-ε mathematical model has been established to cope with the limitations of traditional cold and hot-state performance tests of boilers. In combination with cold-state performance tests of boilers, in-furnace aerodynamic fields were simulated by using software FLUENT of computational fluid dynamics. The basic agreement of the numerical simulation results with those of cold-state performance tests and comparatively good coincidence of the distribution tendency of both results indicate that the numerical simulation method under discussion can relatively well reflect the true characteristics of in-furnace flow fields. Hence, the foregoing has demonstrated the correctness and reliability of the mathematical model, providing more comprehensive data and information for further improving boiler cold-state performance tests and for performing hot-state numerical tests.