矩形微波腔体双馈口位置与加热效率仿真及验证  

Simulation and Verification on the Double Feeder Position and Heating Efficiency of Rectangular Microwave Cavity

作　　者：宋瑞凯 张付杰[1] 杨薇[1] 李淑国 郝铎 姚斌[2] 

机构地区：[1]昆明理工大学现代农业工程学院,云南昆明650500 [2]云南师范大学物理与电子信息学院,云南昆明650500

出　　处：《昆明理工大学学报（自然科学版）》2017年第6期51-57,共7页Journal of Kunming University of Science and Technology(Natural Science)

基　　金：云南省科技计划面上项目(2014FB141)

摘　　要：针对热风微波耦合装置设计了一种双馈口矩形微波加热腔体,利用电磁仿真软件HFSS对矩形微波加热腔体建模,分别建立了体积相当、位置一致的圆柱形和长方体样品模型.仿真了不同的馈口位置、样品形状及物料装载量对微波加热效率的影响.通过分析S参数曲线得到两个馈口应相互垂直分布以及馈口的最佳安装位置;通过仿真结果可得知,内置圆柱形样品的腔体场强分布更加均匀,其微波加热效率相比长方体形样品提升了11.08%;微波加热效率随物料装载量增加呈现上升趋势.通过试验得到该加热腔的有效功率为71%~75%,验证了馈口分布、位置以及微波加热腔尺寸设计的合理性,该研究结果在热风微波耦合装置研发过程中有较实际的指导意义.This paper proposes a double - feeder rectangular microwave heating cavity, which was modeled by the electromagnetic simulation software HFSS. Cylindrical and rectangular models with same size and position were designed. The effects of feeder positions, shapes of sample materials and sample volumes on the microwave heating efficiency were simulated. By analyzing the S -parameter curve, the two feeders should be perpendicular to each other and we can acquire the optimal installation position of feeder. Through the results of simulation can be learned, built - in Cylindrical cavity sample field strength distribution more evenly and microwave heating effi- ciency of the cylindrical vessel is 11.08% higher than that of the rectangular one and the microwave heating effi- ciency increases with the increase of the material loading capacity. Experiment results show that the effective power of the heating chamber is 71% to 75 % , which verifies the rationality of this design--the distribution and locations of the feed port and the size of the microwave heating chamber. It is of practical significance for the de- velopment the hot air microwave coupling devices.

关 键 词：微波 馈口位置 容器形状 装载量 加热效率 

分 类 号：TS255.35[轻工技术与工程—农产品加工及贮藏工程]