层流条件下传质过程对舰船电场的影响  

Influence of mass transfer process on ship electric field under laminar flow condition

作　　者：王向军[1] 张建春[1] 徐庆林 WANG Xiang-jun;ZHANG Jian-chun;XU Qing-lin(College of Electrical Engineering,Naval Univ.of Engineering,Wuhan 430033,China)

机构地区：[1]海军工程大学电气工程学院,武汉430033

出　　处：《海军工程大学学报》2020年第2期1-6,14,共7页Journal of Naval University of Engineering

基　　金：国家自然科学基金资助项目(41476153)。

摘　　要：为了使直流电流元模型仿真结果更加接近实际情况,首先建立了螺旋桨圆盘等效模型;然后,结合电化学及流体力学相关理论,从流动腐蚀角度对舰船在海水中的腐蚀电流密度进行分析,并基于Navier-Stokes方程得出了圆盘表面氧气的传质过程控制下的极限腐蚀电流强度,建立了腐蚀电流元模型求解三层介质中的静电场;最后,进行了实验验证。结果表明:螺旋桨转速的增加会导致静电场幅值增加,且电场幅值的变化与测量点及船壳破损的位置有关,实际腐蚀过程中边缘效应的影响不可忽略。To make the simulation results of DC current element model closer to the actual situation,the equivalent model of propeller disk is established to deduce the corrosion electrostatic field in laminar flow.The corrosion current density of ships in seawater is analyzed from the point of view of flow corrosion based on electrochemical and hydrodynamic theories.The limiting corrosion current intensity controlled by the mass transfer process of oxygen on the disk surface is obtained by employing the equation,and the corrosion current element model is established accordingly to solve electrostatic field in three-layer medium.Finally,the correctness of the results is verified by experiments.The results show that the increase of propeller speed can lead to the increase of electrostatic field amplitude,and the change of electric field amplitude is related to the measurement point and the position of hull da-mage,whereas the effect of edge effect cannot be ignored in the actual corrosion process.

关 键 词：电流元 静电场 三层介质 圆盘等效模型 传质过程 腐蚀电流密度 

分 类 号：TM153[电气工程—电工理论与新技术]