摘要
分析了承压阀门内漏过程中流体流动状态 ,以及声源产生机理 ,建立了阀门泄漏产生的声源信号幅度与内漏率的一般关系 .利用研制的实验台对阀门内漏进行检测实验 ,并探讨了泄漏时阀门开度、两侧压差等状态变化时的声学特性 .研究结果表明 ,阀门湍流流场产生的声源主要为四极子声源 ,其声能随着压差和流速的增大而增强 .因此 。
The relation of acoustic signal amplitude and inner leakage r ate was based on analyzing the flowing characteristics of fluid and the physical origin of leak noise in leakage valve. The test equipment was set up in order t o detecting the inner leakage of valves, and the acoustic characteristics were d iscussed when the gap sizes and pressure differences were changed. The results s howed that turbulence was essentially a quadrupole source in leakage valve, and the acoustic energy radiated from leakage valve increased with increasing pressu re difference and flow rate. Therefore, acoustic method may be used to detect th e leakage of valves and estimate leakage rate.
出处
《大庆石油学院学报》
CAS
北大核心
2003年第3期70-73,共4页
Journal of Daqing Petroleum Institute
基金
黑龙江省教委科学技术研究基金项目 ( 1 0 51 1 1 2 7)
关键词
声学检测
阀门
内漏
湍流
四极子声
acoustic detecting valve
inner leakage
turbulence
quadrupo le source
