• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Biennial International Pipeline Conference(IPC 2004) vol.3; 20041004-08; Calgary(CA) >A PRACTICAL IMPLEMENTATION OF PRESSURE TRANSIENT ANALYSIS IN LEAK LOCALIZATION IN PIPELINES
【24h】

A PRACTICAL IMPLEMENTATION OF PRESSURE TRANSIENT ANALYSIS IN LEAK LOCALIZATION IN PIPELINES

机译：管道泄漏局部化过程中压力瞬态分析的实际实现

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In the present study, a more realistic approach for using pressure transient analysis in leak detection and localization is proposed. In a previous publication by the authors, the feasibility of using pressure transients, generated by full closure of a downstream solenoid control ball valve, in leak detection and localization is investigated. The main shortcoming of using the full closure of a downstream valve is the very high pressure rise that may reach 14 times the operating pressure. Also, full valve closure yields to discontinue the whole pipeline flow. In the present paper, a controlled partial downstream or upstream valve closure is used as a mean of generating pressure transients to overcome the above drawbacks. The percentage of the valve closure is controlled to reduce the pipeline flow rate by 20- 80%. Pressure transients generated by a partial valve closure are investigated experimentally and numerically. The experimental setup consists of a 60 m long and 25.4 mm internal diameter PVC pipelines connecting two tanks. Leaks are simulated at different locations along the pipeline to investigate the effect of leak positions. The pressure time history is recorded using piezoelectric pressure transducers located at five equidistance points along the pipeline connected to a Data Acquisition System. Experiments are carried out for different leak quantities ranging from 2% to 20% of the pipe flow rate. The numerical model accounts for complex pipe characteristics, such as unsteady friction and viscoelastic behavior of pipe walls. The leak is treated as a flow through an orifice of prescribed size. The numerical model is experimentally verified to insure the capability of the model in accounting for unsteady and viscoelastic complex phenomena and efficiently simulating pressure transients in the presence of a leak.
机译：在本研究中，提出了一种在泄漏检测和定位中使用压力瞬态分析的更现实的方法。在作者先前的出版物中，研究了在泄漏检测和定位中使用由下游电磁阀球阀完全关闭而产生的压力瞬变的可行性。使用下游阀门完全关闭的主要缺点是很高的压力上升，可能达到工作压力的14倍。同样，完全关闭阀门会中断整个管道的流动。在本文中，受控的部分下游或上游阀门关闭被用作产生压力瞬变的手段，以克服上述缺点。控制阀关闭的百分比以将管道流速降低20-80％。由部分阀门关闭产生的压力瞬变被实验和数值研究。实验装置由一条60 m长，25.4 mm内径的PVC管道连接两个储罐组成。模拟泄漏沿管道的不同位置以调查泄漏位置的影响。使用位于与数据采集系统相连的管道上五个等距点处的压电压力传感器记录压力时间历史。针对管道流量的2％至20％范围内的不同泄漏量进行了实验。数值模型说明了复杂的管道特性，例如管道壁的非定常摩擦和粘弹性行为。泄漏被视为通过规定大小孔口的流量。数值模型经过实验验证，可确保模型能够解决非稳态和粘弹性复杂现象，并能有效模拟存在泄漏的压力瞬变。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号