高炉炉缸炉底内衬的等效冷却条件计算方法

建立了高炉炉缸炉底冷却的二维有限元传热模型.该模型能计算紊流水冷冷却器以等效对流换热系数表征的冷却参数,能反解服役炉缸实际冷却强度.等效冷却条件参数可用于缩小多维炉缸传热模型的计算域和规模,且不失边界条件精度.文中设计了参数化有限元建模及分析的计算程序,基于管内紊流水努赛尔特征数,定义一个物性综合系数,构造了更为简明的对流换热系数计算表达式.

Calculation method of equivalent cooling conditions for blast furnace hearth and bottom

According to theory of the two dimensional heat transfer, a model was established for blast furnace hearth and bottom. This model can calculate the turbulent water cooler’ s cooling condition parameters which was expressed by equivalent coefficient of convective heat transfer,and it can reflect the working cooling intensity of service hearth. The calculating domain and scale of the multi -dimensional heat transfer can be decreased by using the equivalent cooling condition parameters,and the precision of the boundary can also be ensured. Based on the Nusselt number of turbulent flow water in pipe, a composite coefficient of physical properties was defined. Thus it gived a more concise coefficient of convective heat transfer calculation formula.