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管内插入物是强化管内换热的有效方法,内插可旋转结构在强化换热的同时还具有良好的除垢抑垢效果。实验研究了内插螺旋弹簧转子的管内换热以及转子的转动特性。结果表明,与光管相比,换热增强30%,但流动阻力增加5倍左右,转子的参数需要进一步优化以减小阻力。转子的转速与来流速度呈线性递增关系,与入口处转子相比,下游转子的转速逐渐降低,单螺旋转子转速降低的幅度大于双螺旋转子。双螺旋结构连续稳定运行半年以上,该转子强化换热及除垢抑垢性能稳定。
Tube insert is an effective way to strengthen the tube heat transfer, interpolation rotatable structure in the heat transfer enhancement also has a good anti-scaling effect. The heat transfer inside the tube and the rotor rotation characteristics of the interpolated coil spring were experimentally studied. The results show that, compared with the light pipe, heat transfer increased by 30%, but the flow resistance increased by 5 times, the rotor parameters need to be further optimized to reduce the resistance. Rotor speed and the flow rate of a linear relationship between the increase, compared with the entrance of the rotor, the downstream rotor speed gradually decreased, single-screw rotor speed reduction greater than the double helical rotor. Double-helix structure for more than six consecutive years of stable operation, the rotor heat exchanger and scaling anti-scaling performance and stability.