中文摘要：

针对国内沥青路面养护车加热装置效率不高、辐射过大等问题,为了提高沥青路面养护时沥青混合料加热质量和加热效率,设计了带搅拌功能的沥青混合料加热滚筒,对滚筒进行了结构与保温层参数计算,给出了设计计算方法。利用Fluent仿真软件,采用标准k-ε双方程模型和传热模型对沥青混合料的加热过程进行数值模拟。通过数值模拟分析,建立沥青混合料的流动及加热三维分析模型,进行了仿真分析与试验验证。结果表明：所设计的沥青混合料加热搅拌滚筒具有较好的加热效率与加热均匀性。与传统的导热油加热方式相比,可将加热时间由8 h缩短至35 min左右,大幅提高了加热滚筒的加热效率;通过对滚筒叶片参数的耦合仿真分析,发现当叶片螺旋角为68°、叶片高度为300 mm时沥青混合料加热效率最高,为沥青混合料加热滚筒的设计、温度场分析提供参考。

英文摘要：

The asphalt pavement repair has the requirements of fast reaching the site, timely repair, and opening to traffic soon. In order to meet the requirements, the heating efficiency of asphalt pavement maintenance vehicle is very important. The existing heating asphalt mixture has low heating efficiency and can＇t meet the increasing need of asphalt pavement repair. In order to solve the problems of lower heating efficiency, excessive radiation and other defects of the domestic asphalt pavement maintenance vehicle, and to improve the heating quality and heating efficiency of asphalt mixture in asphalt pavement maintenance, a new type of heating and stirring roller of asphalt pavement maintenance vehicle is proposed. The Fluent software is used to simulate the heating efficiency of the heating roller, which provides the theoretical basis and research methods for the design of the heating drum of asphalt mixture and the temperature field analysis. The asphalt mixture heating roller with stirring function is designed, the roller structure and thermal insulation layer are calculated, and the design calculation method is given. By using the Fluent simulation software, the heating process of asphalt mixture is simulated by using standard k- ε double- equation model and heat transfer model.Through numerical simulation and analysis, the three-dimensional（3D） analysis model of asphalt mixture flow and heat is established. Meantime, the simulation analysis and experimental verification are carried out. The results show that the asphalt mixture has high heating efficiency and good heating uniformity using the designed stirring and heating roller. In the heating process, the bottom temperature is always higher than that of the intermediate layer and the surface layer. At the end of the heating, temperature difference between the surface and the bottom is about 1 ℃, asphalt mixture has a uniform distribution of temperature which has reached 160 ℃, and heating effect is good without temperature segregation. Compared with