Research on Rapid Detection Method of Pipeline Leakage Based on The Transient Flow Method

抄録

This paper presents a numerical simulation of a leaking pipeline and verifies the method's applicability using existing experimental data. The method involves generating reflected waves at the leak point by using pressure waves generated by fast valve closure, which causes aberrations in the pressure signal at the valve. The different times of aberration at different leak locations can be used to determine the location of the leak. Furthermore, the time domain information of the pressure signal is refined using the wavelet transform method to capture sudden changes in the pressure signal, which improves the accuracy of the leakage position. This method was tested for different leak locations, sizes, and pipeline wave speed conditions, resulting in accurate detection with an error of less than 1%. When there are multiple leak locations in the pipeline system, the method has a high degree of recognition of the existence of multiple leak locations and can accurately detect the location of each leak. Additionally, the effect of different valve closing times on the pressure waveform of pipeline leaks was studied, demonstrating that slow valve closure can detect the occurrence of a leak in the pipeline, while fast valve closure can be used to locate the leak.