内置转子换热管旋流部分的数值模拟

摘要

This paper investigated heat transfer and resistance characteristics of the tube assembled with spiral two blades rotors,with 60%glycerol as the heat transfer fluid. The method of simulation for fluid with high viscosity was obtained by experimental study and numerical simulation research. Vortex length of single rotor,the influences of rotor’s interval on heat transfer and resistance characteristics were analyzed as well. The simulation results showed that for the tube with the same length,Nusselt number with rotors without interval arrangement increased to 1.073-1.078 times than rotors with interval arrangement,but the friction factor in the tube with rotors without interval arrangement increased 61.76%-62.01%. Thus the comprehensive heat transfer performance of the former was better. Therefore,the rotors with interval arrangement were more helpful to improve the comprehensive heat transfer performance of the tube.%研究了介质为60%甘油时内置螺旋两叶片转子换热管的传热及阻力特性，通过实验研究和数值模拟，得到了介质为高黏度流体时强化传热的模拟方法。同时，分析了单个洁能芯转子在强化管内的旋流长度，并对比分析了转子间隔对强化管传热及阻力特性的影响。模拟结果表明，在换热管长度相同的前提下，转子无间隔排列强化管的努塞尔数（Nu）是转子间隔排列时的1.073～1.078倍；但是前者的阻力系数（f）则比后者的阻力系数高出61.76%～62.01%，因而在强化传热综合性能方面，前者的综合性能优于后者，由此推断，转子的间隔排列方式有利于提高强化管的强化传热综合性能。