基于CFD的球阀关闭过程水击现象研究  

Research of the Water Hammer in the Process of Closing Ball Valve with Different Regulation Based on CFD

作　　者：许文奇 彭利坤[1] 屈铎 XU Wenqi PENG Likun QU Duo(College of Power Engineering, Navy University of Engineering, Wuhan Hubei 430033, Chin)

机构地区：[1]海军工程大学动力工程学院,湖北武汉430033

出　　处：《机床与液压》2017年第11期170-174,共5页Machine Tool & Hydraulics

摘　　要：考虑流体可压缩性,采用FLUENT滑移网格与UDF技术模拟不同关阀规律下球阀关闭瞬态过程,分析不同关阀规律对球阀流场和水击压强的影响。结果表明;线性关阀时,随着关阀时长的增加,最大水击压强逐渐减小且衰减程度递减,相同开度下流场内最大流速递减;当关阀时长为0.3 s时,针对该模型采用"有效时长前20%关阀36°"的两阶段线性关阀规律能有效降低水击压强。Considering the compressibi lity of water, the rotation process of bal l valve was simulated by sl iding grid and UDF technology of FLUENT software. The influence of valve＇s closure regulation on the flow field and water hammer pressure were ana-lyzed. The results show that, when the valve is closed at a constant speed, increasing closure time will reduce the water hammer pressure and the attenuation degree will decrease; the maximal velocity off low filed in the same degree will reduce too. When closure time is 0. 3 seconds, the two-stage closing regulation of quick closing 36° in 0. 053 seconds can effectively reduce the water hammer pressure.

关 键 词：CFD 瞬态数值模拟 球阀关闭规律 水击压强 

分 类 号：TH137[机械工程—机械制造及自动化]