摘要
微波对物质的加热涉及电磁、热、加热物的物理参数随温度变化等多种物理过程的综合作用。研究耦合电磁场、热传导和被加热物质物理参数方程构建多物理场方程组,数值求解获得微波加热过程的温度变化。给出多物理场算法公式和计算流程,以2.45 GHz微波加热水为例,多物理场仿真了该加热过程的微波功率分布、热量累积和温度上升,设计和加工制作了微波加热实验装置。在工作频点2.45 GHz处,测试装置的回波损耗为16.2 dB,同时测试了输入功率40 W时4个指定点处60 s内的温升,多物理场仿真结果与测试结果吻合良好,验证了多物理场仿真的正确性。
Microwave heating involves multi-physical effects such as the electromagnetic,thermal,physical parameters of heating objectives varying with the temperature.The multi-physics simulation,which couples with the electromagnetic field,heat conduction and material physical parameter equations to construct a multi-physics equation,and numerically solves the equation to analyze the temperature variation in the microwave heating procedure.Taking 2.45 GHz microwave power heating water as an example,the multi-physics simulation is conducted to get the microwave power distribution,heat accumulation and temperature rise during the heating process.Moreover,an experiment equipment of microwave heating water is designed and manufactured.In the working frequency of 2.45 GHz,the testing return loss is 16.2 dB.The input power is set to 40 W and the temperature rises are tested at 4 designed points within 60 seconds of heating time.A good agreement is shown between the multi-physics simulation results and the measurement results,which validates the proposed multi-physics simulation.
作者
郑亚琪
陈星
ZHENG Yaqi;CHEN Xing(College of Electronic and Information Engineering,Sichuan University,Chengdu Sichuan 610064,China)
出处
《太赫兹科学与电子信息学报》
北大核心
2018年第2期302-306,共5页
Journal of Terahertz Science and Electronic Information Technology
关键词
微波加热
多物理场仿真
温度
复介电常数
microwave heating
multi-physics simulation
temperature
complex permittivity
