摘要
为获得不同关闭时间下蝶阀流场特性,通过设定适当的边界条件,采用非结构网格对控制方程组进行离散,利用fluent动网格技术分析不同的蝶阀,关阀时间对水击最大压强及阀板后端涡街长度的影响。结果表明,匀速关闭时增大关阀时间对减小水击压强的作用效果在0.6s前较为明显;在蝶阀关闭过程中,阀板后部出现涡街现象,且涡街长度与关闭时间有关。
In order to obtain the flow field characteristics of the butterfly valve under different closing time,by setting the appropriate boundary conditions,inversion systems are discreted through unstructured grid.The fluent dynamic mesh technique is adopted to analyze the different butterfly valve.And then the impact of closing time on the maximum pressure of water hammer and the length of the vortex street at back-end of the valve plate are analyzed.The results show that the effect of increasing the closing time on the reduction of the water pressure is more obvious before 0.6 s.During closing the butterfly valve,the phenomenon of vortex street appears on the rear of the valve plate,and the length of vortex street is related to the closing time.
出处
《水电能源科学》
北大核心
2017年第10期168-170,164,共4页
Water Resources and Power
基金
国家自然科学基金项目(51275432)
四川理工学院研究生创新基金(y2016019)
关键词
蝶阀
关闭时间
水击
涡街
动网格
butterfly valve
closing time
water hammer
vortex street
moving grid
