摘要
为解决瞬变流泄漏检测法应用于工程实践所面临的瞬变流激发困难、强度难以控制、需要阀门流阻特性等技术难题,借鉴空气罐这一水锤防护设备,基于高压气体膨胀、驱使下侧水体进入待检测管道、制造流量突变、激励瞬变流的流体动力学特征,设计了一种新型瞬变流激发器,并提出了以该设备为核心的管道系统泄漏检测法.通过数理分析构建了系统及激发器的理论模型,给出了数值求解算法.针对具体算例设计了瞬变流激发器,研究了所提出方法的检漏性能.结果表明,激发器所激励的瞬变流是低强度的,可以通过改变初始气体压力来控制压力幅值;提出的瞬变流泄漏检测法能够较为准确地辨识管道的泄漏信息.
Leak detection in pipelines using transient analysis is still challenging in hydraulic transient actuation, due to the uncontrollability of pressure amplitude peaks and the missing of prior information.To solve the problem, a novel hydraulic transient actuator was proposed based on the air chamber, in which high-pressure air expands and drives water into pipes to induce sharp discharge change and transient flow.With the actuator, a new leak detection method was proposed in this study.This yields a theoretical model for the actuator and the controlling system with a giving numerical algorithm.The model is further applied and validated in several cases.The simulated result shows that the hydraulic transient process induced by the actuator is low-strength, and it is correlated with the initial air pressure inside.The new leak detection method performs well in identifying the leakage information in pipelines.
作者
李甲振
余弘婧
郭新蕾
郭永鑫
王涛
付辉
黄伟
LI Jiazhen;YU Hongjing;GUO Xinlei;GUO Yongxin;WANG Tao;FU Hui;HUANG Wei(State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin,China Institute of Water Resources and Hydropower Research,Beijing 100038,China;School of Civil Engineering and Arehitecture,Nanchang University,Nanchang 330031,China)
出处
《应用基础与工程科学学报》
EI
CSCD
北大核心
2022年第4期873-882,共10页
Journal of Basic Science and Engineering
基金
国家重点研发计划项目(2016YFC0400603)
国家自然科学基金项目(51609265,51679262,51909115)
中国水科院院专项人才项目(HY0145B802017)。
关键词
管道
泄漏检测
瞬变流
激发器
可控
低强度
pipe
leak detection
transient flow
actuator
controllable
low-pressure