Wuhan Institute of Technology
针对玻纤增强塑料(GFRP)浮动球阀在使用过程中的流道冲蚀问题,运用Fluent软件对DN50球阀流道的流场进行了气-固两相流模拟分析,研究了球阀内部流场运动现象,分析了球阀壁面冲蚀速率的变化规律和影响因素,借助实验数据验证了模型的正确性,研究结果表明:在阀球部分相对开度(CV=20~80)时,球阀内部的循环流会造成一定的能量损失,流速的增大和阀球相对开度的减小都会增大流道内流体的能量损失；入口速度增大,可减小流道被冲蚀的面积；而壁面冲蚀速率则相反,随着粒子直径增大,壁面冲蚀速率先减小后增大；阀球相对开度的变化改变了球阀流道结构,当颗粒直径为d=180 μm时,调节球阀相对开度对壁面冲蚀率影响较小且冲蚀速率最高为7.069 ×10-11kg/m2·s,当颗粒直径为d=850 μm时,增大球阀相对开度CV=20至CV=80能够降低壁面冲蚀速率64.3%。
In response to the erosion problem in the flow channel of glass fiber reinforced plastic (GFRP) floating ball valve during use, Fluent software was used to simulate and analyze the gas-solid two-phase flow field of the flow channel of DN50 ball valve. The movement phenomenon of the internal flow field of the ball valve was studied, and the variation law and influencing factors of the erosion rate on the wall of the ball valve were analyzed.The correctness of the model is verified by experimental data validation. The research results showed that when the relative opening of the valve ball (CV=20~80), The circulating flow inside the ball valve will cause a certain amount of energy loss, and an increase in flow rate and a decrease in the relative opening of the valve ball will increase the energy loss of the fluid in the flow channel; Increasing the inlet velocity can reduce the area of erosion in the flow channel; On the other hand, the erosion rate on the wall is opposite. As the particle diameter increases, the erosion rate on the wall first decreases and then increases; The change in relative opening of the valve ball changes the flow channel structure of the ball valve. When the particle diameter is d=180 μm, adjusting the relative opening of the ball valve has little effect on the wall erosion rate, and the highest erosion rate is 7.069×10-11 kg/m2·s. When the particle diameter is d=850 μm, increasing the relative opening of the ball valve CV=20 to CV=80 can reduce the wall erosion rate by 64.3%.
夏亚忠,陈琦,喻九阳,等. 玻纤增强塑料浮动球阀冲蚀研究[J]. 科学技术与工程, , ():复制