内置转子强化管抗污垢性能数值模拟

采用数值模拟方法研究光管及内置螺旋叶片转子强化管的抗污垢性能,得到换热管颗粒污垢体积分数分布,研究流体流速对强化管抗污垢性能的影响.结果表明:与在相同条件下的光管相比,强化管管内沉积的污垢明显减少;由于颗粒自身重力影响,底部沉积的污垢体积分数高于换热管顶部;随着流体流速的增加,强化管底部的颗粒污垢体积分数有所减小,顶部的颗粒污垢体积分数有所增大,并且强化管的颗粒污垢体积分数不断趋近于入口处设置的颗粒污垢体积分数.

Numerical simulation on anti-dirt performance of enhanced tube with rotors

The anti dirt performance of the plain tube and the enhanced tube with helical blade rotors is studied by numerical simulation method, the dirt particle volume fraction distribution of the heat exchange tube is obtained, and then the effect of the flow velocity on the anti dirt performance of the enhanced tube is studied. The results indicate that, compared with the plain tube under the same conditions, the dirt in the enhanced tube decreases significantly; due to the gravity effect of the particle, the particle volume fraction at the bottom of the tube is higher than that at the top of the tube; with the increase of the flow velocity, the particle volume fraction at the bottom of the enhanced tube decreases and that at the top increases, and the particle volume fraction of the enhanced tube approaches that set at the inlet.