摘要
针对液体管道阀门的内漏问题,以DN25液体管道球阀为研究对象进行了数值模拟和实验的综合性研究。首先,通过Fluent模拟得到了液体管道阀门固定开度下和固定进口压力下的内漏流场和声场的分布规律。其次,搭建液体管道阀门内漏实验平台验证模拟规律,基于声发射系统采集内漏样本数据,以均方根值、能量计数两个声发射信号特征参数表征内漏声源信号强度并得到特征参数与压力、开度的关系;频域峰值的集中分布范围。在实验与模拟结果对比验证中,两者在内漏率变化趋势和声强分布规律上总体保持一致,内漏率平均百分比误差在10%以内,证实了内漏模拟的有效性。
Aiming at the internal leakage problem of liquid pipeline valves,the DN25 liquid pipeline ball valve was taken as the research object to conduct a comprehensive study of numerical simulation and experiment.Firstly,the distribution laws of internal leakage flow field and sound field under the fixed opening of liquid pipeline valve and the fixed inlet pressure are obtained by Fluent simulation.Secondly,an experimental platform for valve internal leakage of liquid pipeline is built to verify the simulation law.The sample data of internal leakage are collected based on the acoustic emission system,and the signal strength of internal leakage sound source is characterized by two characteristic parameters of acoustic emission signal,namely mean square root value and energy counting,and the relationship between characteristic parameters and pressure and opening degree is obtained.The concentrated distribution range of frequency domain peak.In the comparison of experimental and simulation results,the variation trend of internal leakage rate and sound intensity distribution are generally consistent,and the average percentage error of internal leakage rate is less than 10%,which confirms the effectiveness of internal leakage simulation.
作者
王峰
孔文昊
李振林
孙士恩
李想
WANG Feng;KONG Wenhao;LI Zhenlin;SUN Shien;LI Xiang(Zhejiang Energy Group Co.,Ltd.,Hangzhou 310000,China;China University of Petroleum,Beijng 102200,China;Zhejiang Energy and Natural Gas Group Co.,Ltd.,Hangzhou 310000,China)
出处
《无损探伤》
2023年第2期22-28,41,共8页
Nondestructive Testing Technology
关键词
计量学
液体管道阀门
内漏速率
声发射技术
声流场模拟
Metrology
Liquid line valve
Internal leakage rate
Acoustic emission
Simulation of sound and flow field
