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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 of the surface of the helical groove was simulated by the model, and the change of fouling resistance with time under various influencing factors was analyzed. The results show that the thermal resistance of fouling decreases with the increase of flow rate and increases with the increase of solution inlet temperature and inlet temperature of hot fluid. The fouling thermal resistance increases first and then decreases with the increase of initial solution hardness. The geometry of the fluted tube has a great influence on the formation of the surface thermal resistance. The fouling resistance decreases with the increase of the helical flute groove depth, and increases with the increase of the pitch. In the meantime, the paper analyzes the influence of various factors on the fouling process from the mechanism of fouling formation.