螺旋槽强化表面结垢影响因素的模拟分析

Simulation Analysis on Influence Factors of Spiral-grooved Tube Surface Fouling Process

本文通过模型模拟了螺旋槽强化表面的结垢过程,分析了多种影响因素条件下污垢热阻随时间的变化。结果表明:污垢热阻随流速的增加而减小,随溶液入口温度和热流体入口温度的增加而增大;污垢热阻随初始溶液硬度的增加呈现先增大后减小的变化趋势;螺旋槽管几何尺寸对表面热阻形成有较大影响,污垢热阻随螺旋槽管槽深的增加而减小,随螺距的增加而增大。同时,本文从污垢形成机理方面分析了各因素对结垢过程的影响。

In this paper,the fouling process on spiral-grooved tube surface was simulated,and the fouling resistance variation trends with time under different influenced parameters were analyzed.The results indicated that the fouling resistance decreased with the increased fluid velocity,and it would increase when the solution inlet temperature and heating fluid inlet temperature were increased.Also,the fouling resistance would increase initially but then decrease with the increase of solution hardness.Furthermore,geometric parameters of spiral-grooved tubes had remarkable effect on fouling resistance,the increase of groove depth and decrease of screw pitch would result in the decrease of fouling resistance.In addition,the influences of different parameters on the fouling process were analyzed from the perspective of fouling formation mechanisms.