介质附着对扫频微波加热均匀性的影响分析

Processes Pub Date : 2024-08-08 DOI:10.3390/pr12081668
Can Liang, Yuehao Ma, Feng-Lei Yang, Chengzhuo Wang, Huacheng Zhu, Yang Yang, Long Gao, Jia Liu
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引用次数: 0

摘要

传统的微波加热面临着效率低、加热不均匀等挑战,阻碍了其在工业领域的应用。扫频微波加热是改善加热均匀性的有效方法。由于会产生更多的谐振模式,较大的腔体尺寸会带来更好的加热均匀性。然而,在工业应用中,较大的腔体占据了大量空间,使其灵活性较差,限制了其可用性。本文介绍了一种通过在空腔壁上添加介电物质来提高扫频微波加热均匀性的方法。首先,研究了增大腔体尺寸对扫频微波加热均匀性的影响,理论分析表明,在腔体中填充介电物质相当于增大腔体尺寸。随后,建立了扫频微波加热的多物理场仿真模型,分析了介电物质厚度和介电常数对加热均匀性的影响。设计了一个高效率、高均匀性的微波多模腔,并通过实验验证了仿真模型的准确性。最后,分析了扫频范围和负载变化对加热性能的影响。该方法有效地解决了工业微波加热中的均匀性问题,有助于促进微波能在工业中的应用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Analysis of Dielectric Attached on Sweep Frequency Microwave Heating Uniformity
Traditional microwave heating faces challenges such as low efficiency and uneven heating, hindering its industrial application. Sweep frequency microwave heating is an effective way to improve uniformity. Larger cavity sizes result in better heating uniformity due to the generation of more resonant modes. However, in industrial applications, large cavities occupy significant space, making them less flexible and limiting their usability. This paper introduces a method to enhance sweep frequency microwave heating uniformity by adding a dielectric substance to cavity walls. First, the impact of increasing cavity size on the uniformity of sweep frequency microwave heating was studied, with the theoretical analysis showing that filling the cavity with dielectric materials can be equivalent to enlarging the cavity size. Subsequently, a multiphysics simulation model for sweep frequency microwave heating was established to analyze the effects of dielectric substance thickness and permittivity on heating uniformity. A high-efficiency, high-uniformity microwave multimode cavity was designed, and the accuracy of the simulation model was validated through experiments. Finally, the effects of sweep frequency range and load variations on the heating performance were analyzed. This method effectively addresses the uniformity issues in industrial microwave heating and aids in promoting the application of microwave energy in industry.
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