食物位置对热风微波耦合加热效果的影响

Effect of Different Positions on Hot-Air and Microwave Coupled Heating

DOI：10.3969/j.issn.1673-1689.2015.06.005

中文关键词: 微波热风耦合 电磁场 温度场 数值模拟仿真

英文关键词: hot-air and microwave coupled heating, electromagnetic fields, temperature field, numerical- simulation

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中文摘要:

给出了微波与热风耦合同步加热物料的数学物理模型,以微波与热风耦合加热土豆为例，建立了完整的三维仿真模型，采用数值模拟法，分别得到了位于耦合加热腔内7个不同位置上土豆最终温度场的分布参数，并以实验加以验证，对数值模拟所得的仿真结果进行了分析与评定。结果表明，不同位置对热风微波耦合加热物料的效果影响极大，这主要体现在影响微波电磁场能量转化为热能功率的大小，以及密度分布及被加热食品温度场分布的不均匀性，故在采用热风微波加热食品时，应当要重视物料位置对耦合加热效果的影响。

英文摘要:

This study aimed to investigate the effect of different positions on the hot-air and microwave coupled heating. Based on the mathematical model of hot-air and microwave coupled heating, distribution parameters of the end temperature field for seven spots were first obtained for whole potato heated in a particular cavity by numerical simulation techniques. The simulations were further by verified by the experimental results that different spots showed varied heat power values and density distribution after the conversion of microwave electromagnetic energy into heat power and uneven distribution of the temperature field. Therefore, great attention should be paid to the food spots in the hot-air and microwave coupled heating.

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