微波加热沥青混合料传热模型研究.PDF

第37 卷第3 期 Vol.37 No.3 井冈山大学学报( 然科学版) 2016 年5 月 May. 2016 Journal of Jinggangshan University (Natural Science) 70 70 井冈山大学学报( 然科学版) 文章编号：1674-8085(20 16)03-0070-06 微波加热沥青混合料传热模型研究 * 陈陆骏，孙铜生，许德章 （安徽工程大学机械与汽车工程学院，安徽，芜湖 241000 ） 摘 要：为了得到沥青混合料通过微波加热后表面的温度分布情况，通过Maxwell 方程建立了沥青混合料内电场 的分布情况，提出了一种沥青混合料内传热模型的解法，分析了理论求解传热模型的局限性与困难性。使用仿真 和实验的方法，结果表明：第一， 论仿真得到的沥青混合料表面温度高于实验所测得的温度；第二，沥青混合 料在加热过程中，加热区域边界处热量散失明显；第三，沥青混合料被加热区域表面温度梯度明显，且仿真所得 到的温度分布梯度比实验得到的温度分布梯度大；第四，被加热区域沥青混合料最高温度达到了 120 ℃左右也不 会出现明显的焦化现象。 关键词：微波加热；传热模型；温度场；温度测量；辐射屏蔽 中图分类号：U4 18.326 文献标识码：A DOI:10.3969/j .issn.1674-8085.2016.03.013 RESEARCH ON HEAT TRANSFER MODEL OF MICROWAVE HEATING ASPHALT MIXTURES * CHEN Lu-jun , SUN Tong-sheng , XU De-zhang (School of Mechanical and Automotive Engineering, Anhui Polytechnic University, Wuhu, Anhui 241000, China) Abstract: In order to achieve the surface temperature distribution of the asphalt mixture by microwave heating, the equation is established by the Maxwell distribution of the electric field within the asphalt mixture. We propose a solution within the asphalt mixture transfer model. The limitations of the model are solved by analyzing the results in theory. The simulation and experimental methods are used to obtain the temperature distribution on the surface of the asphalt mixture. The theoretical reasons difference between simulation and experimental results are obtained by comparative analysis. Firstly, theoretical simulations on the surface of the asphalt mixture temperature are higher than the measured temperature by