Numerical Simulation Of Induction Heating Based On ANSYS

The induction heating 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. However, the design of an induction heating system based on experiments can be tedious, time-consuming and expensive. Therefore, numerical simulation is a wel-adapted tool for the design and the investigation of induction heating system. In this paper, on the basis of the characteristics of induction heating, the numerical simulation of induction heating is studied and realized. Seven chapters are included in this dissertation.In chapter 1, firstly, the history and applications of induction heating are introduced. Then, outlines the development and status about numerical simulation of induction heating. Finally, the backgrounds of this project and the main contents as well as the significance of this paper are mentioned.In chapter 2, gives a brief introduction to the basic theory of induction heating technique; a mathematical modal is developed to describe the distribution of electromagnetic field and eddy current density in the long solid cylinder billet of induction heating. The general question of eddy current field calculation and the weakness of design theories for induction-heating coils that has won great popularity in engineering are pointed out.In chapter 3, the mathematical modal of electromagnetic and temperature fields is presented by a complex magnetic vector potential, which is also applied to solve eddy current field in ANSYS software. Then, the electromagnetic field analysis, thermal analysis and coupled-field analysis in ANSYS are introduced.In chapter 4, the modeling of induction heating is expatiated. The methods thatrealized the boundary conditions, mesh of modal and dependence of the physical properties on the temperature are given. Moreover, a method for iterating thermal and magnetic analysis is put forward.In chapter 5, the distributed characteristics of eddy and temperature fields in induction heating process are simulation by FEM respectively, including the distributions of eddy and temperature fields during the whole induction heating process, the influence of frequency and magnetic disperse, and the prediction of hardened depth.In chapter 6, the calculation results are validated by comparison with the practical producing results. It is approved the validity and feasibility of the method used in this paper.Some results of this dissertation are concluded in the last chapter. Besides the future tasks on this project are pointed out.