新型强化传热螺杆结构传热性能数值研究及场协同分析

利用CFD软件fluent对普通螺杆结构和新型强化传热螺杆结构在塑化计量段中的三维非等温流场进行数值模拟，研究两种结构流道内熔体的速度场、轴向和径向温度场、对流传热系数及场协同角的不同。结果表明：在塑化过程中，新型强化传热结构存在着径向的对流传质过程，加强了径向的对流传热，因此有较好的径向温度分布；新型结构较普通螺杆结构有较高的对流换热系数和较好的场协同性，从而加强了螺杆的对流传热。
Abstract：Three-dimensional non-isothermal flow fields in the metering section of different screw structures during the plasticization process have been simulated by using CFD-fluent software, and the differences in velocity field, temperature field, radial temperature distribution, convective heat transfer coefficient and field synergy angle for the different screw structures are discussed. The results show that during the plasticization process, a new type of enhanced heat transfer screw structure affords radial mass transfer, thus enhancing the radial convective heat transfer, and the radial temperature distribution is also improved. Moreover, the new structure has a higher convective heat transfer coefficient and better synergy relationship than the conventional screw structure. The results show that there is a substantial improvement in the convective heat transfer of the screw in the case of the new design.