Research On The Numerical Simulation Of Temperature Field In Induction Heating

This paper mainly do research for the numerical simulation of temperature distribution of metal billet in induction heating. The induction heating process generates heat by means of Joule effect resulting from an eddy current , it is widely used in industrial operations due to its high efficiency,precise control and low pollution properties .It is an impotrant problem to control each parameters of the induction heating system to ensure that every properties of metal billet are reasonable.In fact,some properties are linked to temperature distribution in heat treatment process,However,the design of an induction heating system based on experiments would be tedious and time-consuming.Furthermore,temperature measurements are expensive and the induction of sensors often results in perturbing the phenomena. Therefore, numerical simulation seems a well-adapted tool for the design and the investigation of induction heating system.Based on the Electromagnetics theory and Thermal theory,it constructed the mathematic analysis models of electromagnetic field and temperature field. The mathematical model of electromagnetic field are established by A ?φmethod.Then it deduced the finite element discretization equations of electromagnetic field and temperature field by Galarkin weighted residual method.According to the basic principle of numerical simulation, the sequential anlaysis method is selected as the main method to solve the problem of the Electromagnetic-Thermal coupled field by comparing and analysing two coupled field methods offered by ANSYS. The uniform EFM model of eddy current field and temperature field is set on 45# steel .The induction magnetic field and the transient temperature distribution is obtained by means of calculation for heating process. The influence of the technical parameters on the induction heating simulation result is analyzed.,and some referential conclusions are drawed.On the basis of these conclusions, induction heating parameter will be chosen correctly in the design of the induction heating system.At last,it proved that the result of simulation is correct by means of comparing with the result of experiment, numerical simulation seems a well-adapted tool for the design and the investigation of induction heating system.