工业微波加热腔的结构优化设计

Structure optimization design of industrial microwave heating cavity

微波加热在工业生产中有着广泛的应用,但是微波加热的过程中容易出现加热不均匀现象,因此研究分析微波加热不均匀的情况具有重要意义。文章通过使用基于有限元的多物理仿真软件——COMSOL Multiphysics进行仿真,从工业微波加热腔体模型、加热负载位置及激励源的个数方向出发,考虑其对微波加热均匀性的影响。从数值仿真结果可以得到,相比于圆柱腔体和梯形腔体微波加热腔,长方体微波加热腔体在温度均匀性上更具有优势;进一步通过比较长方体微波加热腔在不同负载高度的方差均值数据和平均温度数据,当载体高度h=0.12 m时的加热均匀性较好。此外通过对比不同激励源个数对微波加热均匀性的影响,当激励源为15个时的均匀性较好,该研究对于研究工业微波加热的均匀性有一定的参考价值。

Microwave heating is widely used in industrial production, but it is easy to occur in the process of microwave heating non-uniform phenomenon, so it is very meaningful to study and analyze the non-uniform microwave heating. In this paper, a finite element-based Multiphysics simulation software COMSOL Multiphysics is used to simulate the industrial microwave heating cavity model, heating load position and the number of excitation sources, the effect of microwave heating uniformity is considered. Compared with the cylindrical cavity and the trapezoid cavity, the rectangular cavity has more advantages in temperature uniformity Furthermore, by comparing the mean variance data and mean temperature data of rectangular microwave heating cavity at different load heights, the heating uniformity is better when the carrier height H= 0. 12 m;In addition, by comparing the influence of different excitation sources on the uniformity of microwave heating, when the number of excitation sources is 15, the uniformity is better, this study has some reference value for the study of the uniformity of industrial microwave heating.