YANG Zhen-dong,CAO Ya-long,ZHANG Qiao-ling,et al.Transient Flow Characteristics and Leakage Location of Water Supply Pipeline with Leakage Points[J].China Water & Wastewater,2021,37(15 15):35-40.
Transient Flow Characteristics and Leakage Location of Water Supply Pipeline with Leakage Points
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
15 15
Page:
35-40
Column:
Date of publication:
2021-08-01
- Keywords:
- water supply pipeline; leakage location; transient flow; radial basis function neural network
- Abstract:
- In order to solve the leakage problem of long-distance water supply pipeline, transient flow characteristics in a water supply pipeline were explored by using CFD software, and the detection mechanism of the pipeline leakage point was analyzed. Based on fluid transient model method and RBF neural network method, leakage location of the water supply pipeline was explored. A one-dimensional pipeline system with a length of 1 000 m was established by hydraulic transport model in Flowmaster simulation software. For this system, numerical simulation calculations at different leakage locations were carried out to generate training samples, and network training and prediction under leakage condition was carried out by RBF neural network. The presence of leakage holes in transient flow process had little effect on propagation cycle of water hammer waves in straight pipes. However, it would cause distortion of pressure wave propagation, and the change of pressure amplitude was more obvious at the beginning of a cycle. When excitation and monitors were set at the exit position, the closer the leak hole was to the outlet, the faster the signal attenuation at the detection point would be. The RBF neural network had a strong monitoring capability and antinoise performance.
Last Update:
2021-08-01