基于UDF方法的阀门变速关闭过程中的水击压强计算研究  

Computing research of the water hammer pressure in the process of the variable speed closure of valve based on UDF method

作　　者：郭兰兰[1,2] 耿介[1] 石硕[1,3] 苑飞[1] 雷丽[1] 杜广生[1] 

机构地区：[1]山东大学能源与动力工程学院,山东济南250061 [2]山东科技大学机械电子工程学院,山东青岛266590 [3]可再生能源建筑利用技术省部共建教育部重点实验室,山东济南250101

出　　处：《山东大学学报（理学版）》2014年第3期27-30,36,共5页Journal of Shandong University(Natural Science)

基　　金：国家自然科学基金资助项目(11372166);山东科技大学春蕾计划资助项目(2010azz017)

摘　　要：采用Fluent中的滑移网格技术模拟了球阀的转动过程,对管道中阀门突然关闭引起的水击压强进行了数值计算。计算采用标准k-ε模型并考虑了水的压缩性。通过UDF定义球阀的转动速度,分析了关阀时间和关阀方式对水击压强的影响。结果表明阀门匀速关闭时增大关阀时间对减小水击压强的作用效果在0.3 s之前较为明显;阀门关闭时间一定时,减速关阀方式能有效降低最大水击压强。The rotation process of ball valve was simulated by using the sliding grid technology of Fluent software, and the water hammer pressure caused by the suddenly closed of the ball valve in the pipeline was calculated. In the calcula-tion, the standard turbulent model was used with considering the compressibility of water. The rotational speed of ball valve was controlled by UDF. The influence of valve’ s closure way and time on water hammer pressure were analyzed. Results show that when the valve is closed at a constant speed, the increase of closing time can reduce the water hammer pressure, and the effect is evident before 0. 3 s;when the valve closing time is fixed, the deceleration way can effective-ly reduce the water hammer pressure.

关 键 词：水击 变速关闭 滑移网格 数值模拟 

分 类 号：TV137[水利工程—水力学及河流动力学]