作　　者： (汪博恺）; (金光远）; (崔政伟）; (陈海英）;

机构地区： 江南大学机械工程学院

出　　处： 《热能动力工程》 2017年第S1期91-96,132,共7页

摘　　要： 针对微波反应器加热不均匀性和搅拌系统优化问题,设计具有不同搅拌叶轮的小型微波釜式反应器,采用CFD(计算流体力学)方法研究不同叶轮对微波反应器内流动混合特征的影响规律。对简化后的微波反应器模型设计了3种叶轮,并对反应器内部的三维流场进行数值仿真,对比分析搅拌过程中装备不同叶轮的搅拌釜宏观流型、速度和功耗等特点。研究结果表明:A2、A3叶轮流型发展得更好,A3在粘度高于0.015 Pa·s的介质中更加节能,粘度达到0.065 Pa·s时,功率准数比A1低50%,在远离叶轮区域的流速更高;A1在转速高于50 r/min时更加节能,当转速为300 r/min时,功率准数为0.16。 In this paper,a microwave reactor with different stirring impeller was designed to solve the problem of non-uniformity of heating in the microwave reactor and optimization of the stirring system. The effects of different impellers on the flow mixing characteristics in microwave reactors were studied by CFD. Three kinds of impellers were designed for the simplified microwave reactor model. The three-dimensional flow field inside the reactor was numerically simulated. The macroscopic flow field,velocity and power number of the stirred tank equipped with different impellers were compared and analyzed. The results showed that the flow pattern of A2 and A3 impeller are improved. A3 is more energy-saving in the medium with the viscosity higher than 0. 015 Pa·s and has higher velocity in the area far away from the impeller with the viscosity of 0. 065 Pa·s,of which the power number is 50% lower than that of A1.A1 is more energy-saving with the rotating speed higher than 50 r/min and its power number is 0. 16 when the rotating speed is 300 r/min.

关 键 词： 反应器 叶轮 流型 速度 功耗 数值分析