Research And Modeling Of A Forge Furnace Temperature Field

Natural gas is widely used as fuel for forge furnace in forging industry because of favorably lower price and lighter pollution compared with other kinds of fossil fuel at present time. However, it makes the precise control of inner temperature hard to satisfy the requirement of uniform distribution of temperature field for the complexity of inner flow, combustion and heat transfer in the furnace. This issue is urgently await for solution.In this dissertation, a summary of mathematical temperature field models on forge furnace is made. A three-dimensional temperature field model is established based on the analysis of gas flow, combustion and heat transfer in a real forge furnace (the area is 7.5 m2, Hongyuan Forging Ltd.). This model contains three submodels as followed: standard k ?εmodel, non premixed combustion model and discrete coordinate model. Two commercial softwares GambitTM and FlunetTM were used for body meshing and numerical solution, respectively.The distribution laws of temperature field and flow field are obtained based on the simulation results from different operating conditions. A two-stage numerical simulation method is developed to offset the shortage of this model in dealing with the relation between variables and temperature. The BP neural network was used to model the temperature field based on the data from previous simulation results. The validation of this model was made and the results indicates that the three-dimensional model gives an external vision of the thermal process and provides significant information for the operation and control in a forge furnace.