Investigation on parameters of heat input model in numerical simulation of line heating

The definition of heat flux is important to the numerical simulation of line heating process.The heat flux model of gas flame has been developed by utilizing Gauss distribution heat input model and the methods of experiment combining with numerical simulation.The parameters of heating efficiency and heating radius in the heat input model are adjusted to a possible range to make the temperature distribution of numerical simulation approach to the data measured in experiment, and then the heat flux model is determined.In a definite range of the flow rate of propylene,the effects of heating efficiency and heating radius deviations on the simulation results are analyzed.The results show that the requirements of accuracy in line heating numerical simulation can be satisfied by using this model.The reliability of the heat input model in the simulation is also verified by the example.