摘要
将计算流体动力学理论与两相流技术相结合,建立高水基液压阀流体湍流和气蚀的数学模型,通过可视化模拟,分析先导阀气穴流场的速度、压力和气蚀磨损的分布,发现在节流口阀座锐缘拐角处发生严重气穴,且低压区对应气体体积分数高的气穴区域。提出将正顶杆结构修改为侧顶杆结构消除液压阀气蚀磨损的新方法。
Combining the computational fluid dynamics theory with biphase fluid technique, the mathematic model of turbulent and cavitation erosion for high water-base hydraulic valve are established. By visual simulation, the distribution of velocity, pressure and cavitation wear in cavitation flow field of pilot valve are analyzed. The result shows that the heavy cavitation occurs at sharp edge near the valve seat orifice, and the low-pressure area is corresponding to the cavitation area of high gas volume fraction. A method for eliminating the valve cavitation wear is suggested by changing the center pole structure to sidepiece pole structure.
出处
《煤矿机电》
2007年第5期1-3,7,共4页
Colliery Mechanical & Electrical Technology
基金
国家自然科学基金项目(编号:50575147)
山西省青年科技基金项目(编号:20051029)
关键词
计算流体动力学
两相流
气蚀
数值模拟
CFD （computational fluid dynamic）
BPF （biphase fluid）
cavitation erosion
numerical simulation
