• 论文与研究报告 •

### 木材微波预处理圆柱形谐振腔理论模拟与设计

1. 1. 中南林业科技大学理学院 长沙 410004;
2. 中南林业科技大学材料科学与工程学院 长沙 410004
• 收稿日期:2013-06-13 修回日期:2013-08-02 出版日期:2014-03-25 发布日期:2014-04-16
• 基金资助:

国家林业公益性行业科研专项（201204708）；教育部新世纪优秀人才支持计划（NCET-11-0979）；国家自然科学基金项目（31370564）。

### Mathematical Simulation and Design of Cylindrical Cavity of Microwave Pretreatment Equipment Used for Wood Modification

Luo Yongfeng1, Li Xi1, Li Xianjun2, Chen Hongbin1, Chai Yuan2

1. 1. School of Sciences, Central South University of Forestry and Technology Changsha 410004;
2. School of Material Science and Engineering, Central South University of Forestry and Technology Changsha 410004
• Received:2013-06-13 Revised:2013-08-02 Online:2014-03-25 Published:2014-04-16
• Contact: 李贤军

Abstract:

Based on the Maxwell electromagnetic field equations and the heat and mass transfer mechanism of wood, a heat and mass transport and a electromagnetic field distribution model for wood microwave pretreatment were developed to simulate the effect of the microwave feeding mode and cylindrical resonant cavity radius on the temperature uniformity and microwave energy utilization efficiency using finite element analysis software (Comsol Multiphysics), and the optimizational parameters for the cylindrical resonant cavity was achieved. The results showed that: 1) the effect of microwave feeding mode and the radius of the cylindrical resonant cavity on the temperature uniformity within wood and microwave energy utilization efficiency was significant. 2) Compared with the other microwave feeding mode, the temperature distribution uniformity within wood and microwave energy utilization efficiency was the highest(up to 87.48%)when the microwave radiation with 3 waveguides feeding is used to heat wood. 3) The temperature coefficient variation and microwave energy utilization efficiency basically decreased and then increased with the increasing the radius of the cylindrical resonant cavity, and the optimizational radius for the cylindrical resonant cavity was in the range from 0.186 m to 0.211 m.