两相流场中舰船冲蚀和腐蚀耦合效应的摩擦学行为研究

项目名称： 两相流场中舰船冲蚀和腐蚀耦合效应的摩擦学行为研究

项目编号： No.51475049

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 机械、仪表工业

项目作者： 庞佑霞

作者单位： 长沙学院

项目金额： 83万元

中文摘要： 随着资源的勘探和开采由近海向远海、两极等海域发展，运行在海洋两相流场中的舰船船体将受到固体颗粒的冲刷形成冲蚀，同时海水对船体还存在腐蚀作用。冲蚀和腐蚀耦合磨损已成为制约提高舰船运行速度的关键科学问题。本项目以海洋两相流场舰船船体为研究对象，采用冲蚀磨损测试、电化学测试及表面分析测试相结合的方法，系统地研究模拟工况（材料性质、固体颗粒参数、腐蚀介质、流场参数等因素）下，试件的摩擦学行为以及冲蚀和腐蚀耦合效应的磨损机理。同时基于流体动力学理论，数值分析流场参数（压力、速度、温度、颗粒等）的变化规律；在试验研究的基础上，应用材料学、摩擦学、热力学、腐蚀与防护等理论，分析磨痕的微结构特征、腐蚀坑形貌、微裂纹扩展，从而得出海洋两相流场中舰船船体在冲蚀和腐蚀耦合效应下的摩擦学行为、磨损机理、微裂纹及裂纹群的表征方法。

中文关键词： 两相流场；冲蚀和腐蚀；耦合效应；摩擦学行为；金属材料

英文摘要： With the development of the exploration and exploitation of the resources from offshore to the pelagic, two poles and other waters, the rotating parts of the hull in marine two-phase flows will form erosion by eroding of solid particles, and there exists seawater corrosion at the same time. The cavitation and corrosion coupling wear has become a key scientific issue restricting the improvement of running speed of the ship. This project uses the hull of ship in two-phase flow field as research objects, adopting the combining methods of cavitation wear test, electrochemical test and surface analysis test to systematically study the tribological behavior of the specimens and the cavitation and corrosion coupling wear mechanism in simulating working conditions (material properties, solid particles parameters, the corrosive medium, the low temperature, flow field parameters and other factors). Based on the theory of fluid dynamics, the change laws of the flow field parameters (pressure, velocity, temperature, bubble, etc.) are numerically analyzed. Using material science, tribology, thermodynamics, corrosion and protection theory, the micro-structural feature of the wear scar, the corrosion pit morphology and the micro-crack propagation are analyzed on the basis of the experimental study, and so the tribological behavior, the wear mechanism and the characterization methods of micro-cracks and crack groups of the hull are obtained under the cavitation and corrosion coupling effect in marine two-phrase flows.

英文关键词： Two-phase flow field;Erosion and Corrosion;Coupling Effect;Tribological Behavior;Metal Materials