深井阳极对储罐底板阴极保护的数值模拟

根据热流体能量方程和阴极保护数学模型控制方程的相似性,建立了深井阳极对储罐底板阴极保护体系的数学模型.考虑了土壤介质的不连续性,使用两种典型的电流密度分布假设求解保护电位,得出结论是,(1)两种保护电位分布规律相似;(2)罐底板保护电位差最大值在水平轴线上取得,对于单罐单支深井阳极情形,保护电位最小值不在罐中心,而是位于水平轴线上的某点上;(3)垂直轴线保护电位的不均匀程度小于水平轴线和斜对角线;(4)存在一个阳极临界深度,埋深对储罐近阳极端保护电位的影响大于罐中心和远阳极端.使用该方法可以研究多罐和多支深井阳极的情形,为准确计算罐底板电位差提供依据.

Numerical Modeling of Deepwell Anode to Cathodic Protection of Bottom Plate of Tank

Based on the heat fluid energy equation and the cathodic protection mathematics model controlling e-quation,the tank bottom cathodic protection mathem-atics model of the deepwell anode is established. Considering the asymmetry of the soil medium,imposing the two classical current density hypothesis,the protective potential is obtained,get to the conclusion that abstract:(1)the two protective potential laws are resemble; (2)The biggest difference of the tank bottom protective potential lies in horizontal axes,for the single tank and single deepwell anode,the minimum of protective potential lies in the certain point of horizontal axes, not the center of the tank; (3) the vertical potential asymmetry is larger than that of the horizontal and diagonal; (4)lying in a critical anode depth,the influence of the depth to the intimate region is larger than that of the center and distance region. Employing the method,the case of the multi-tanks and multi-deep-well anodes can be studied in order to accurately calculate the difference of the tank bottom protective potential.