| 微波化学反应器中微波辐射器的一体化设计与优化 |
| |
| 引用本文： | 潘应杰,罗明,华伟,黄卡玛.微波化学反应器中微波辐射器的一体化设计与优化[J].化工学报,2010,61(4):861-866. |
| |
| 作者姓名： | 潘应杰 罗明 华伟 黄卡玛 |
| |
| 作者单位： | 四川大学电子信息学院，四川 成都 610065 |
| |
| 基金项目： | 国家自然科学基金，高等学校博士学科点专项科研项目 |
| |
| 摘 要： | 讨论了一种用于微波化学反应器中的微波辐射器的一体化设计与优化方法。辐射器在工作过程中温度变化剧烈,由此产生的热应力可能造成辐射器破裂,导致反应器不能正常工作,甚至出现爆炸。为避免出现上述现象,基于有限元方法,首先根据电磁场边界条件,对辐射器的传输特性进行分析,初步优化其结构参数,保证辐射器的反射系数尽可能小,以减小微波能量在传输过程中的损耗,然后采用多物理场耦合分析方法,对辐射器进行优化设计,降低了辐射器工作过程中产生的热应力,并避免了在结构突变以及衔接部位产生过大的热应力,改善了辐射器的结构稳定性。
|
| 关 键 词： | 微波化学反应器 辐射器 反射系数 热应力 |
| 收稿时间： | 2009-8-31 |
| 修稿时间： | 2009-12-31
|
Integrated design for microwave radiator used in microwave chemical reactor |
| |
| PAN Yingjie,LUO Ming,HUA Wei,HUANG Kama.Integrated design for microwave radiator used in microwave chemical reactor[J].Journal of Chemical Industry and Engineering(China),2010,61(4):861-866. |
| |
| Authors: | PAN Yingjie LUO Ming HUA Wei HUANG Kama |
| |
| Abstract: | An integrated design and optimization method of the microwave radiator used in a microwave chemical reactor is discussed.The radiator,made of high-borosilicate glass,is an important part of the reactor,by which the microwave energy is delivered from the microwave source to the cavity of the reactor.It is composed of radiating part,baffle and impedance matching part,to obtain better radiating effect.However,under the influence of the microwave energy,the thermal stress,resulted from the large variation of temperature when the reactor is working,may make the radiator crack,so that the reactor does not work properly,even leading to explosion.In order to avoid the above phenomenon,the design of reactor is modified.First,based on the analysis on the electromagnetic transmission characteristics of the radiator,in which the Maxwell equations are solved with the electromagnetic boundary condition by finite-element method,the structural parameters of the radiator is optimized,to make the reflection coefficient as low as possible to reduce the loss of microwave energy during the transmission.Secondly,the design of radiator is modified to improve its stability to avoid the excessive local thermal stress at the transition structure,in which the integrated analysis for multi-fields is applied by solving the Maxwell equations,the heat conduction equation and the thermoelastic equation.The desired results are obtained.The reflection coefficient is below -10 dB,as required,in the frequency range of 2.4-2.5 GHz,the thermal stress is reduced greatly from 17.62 MPa to 12.43 MPa,and the position with the highest thermal stress is away from the joint of the baffle and the radiating part,so that the radiator is more stable during the operation.This method can be applied to develop microwave radiators with good stability,and it is of practical value in the industrial production. |
| |
| Keywords: | microwave chemical reactor radiator reflection coefficient thermal stress |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《化工学报》浏览原始摘要信息 |
|
点击此处可从《化工学报》下载全文 |
|
