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将数值计算与实验研究相结合,引入湍流运动理论,研究了在3.5%NaCl溶液中湍流状态下碳钢的流体腐蚀.针对旋转圆盘体系中的流体力学,采用壁函数、k~ε两方程,建立了湍流状态下腐蚀的数学模型,并进行了计算与分析.结果表明:数值模拟计算值与实验结果基本一致,验证了在湍流下碳钢的腐蚀过程中仍然是电化学因素起主要作用,临界流体力学参数对阐明与流体流动有关的腐蚀现象具有重要意义.
Combining numerical calculation and experimental research, the turbulent kinetic theory is introduced to study the fluid corrosion of carbon steel under turbulent flow in 3.5% NaCl solution. Aiming at the fluid mechanics in the rotating disk system, the mathematical model of corrosion under turbulent flow was established by using the wall function and k ~ ε equations. The calculation and analysis were carried out. The results show that the calculated values are basically in agreement with the experimental ones, and it is verified that electrochemical factors still play a major role in the corrosion of carbon steel under turbulent flow. The critical hydrodynamic parameters are of great importance to elucidate the corrosion phenomena associated with fluid flow.