Water supply pipeline leakage location in the presence of 90&deg; bend

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (6) : 92-98.

Water supply pipeline leakage location in the presence of 90° bend

WEN Jing，ZHANG Minzi，ZHANG Heng

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Abstract

The existence of 90° bend has a negative impact on the performance of pipeline leak dectection and location. For metal pipelines, the leaking pipeline model and 90° bend model were taken as investigated as objects based on the ANSYS simulation software for calculating and analysing the piping flowinduced vibration. And a 90° bend noise suppression method, combining the empirical mode decomposition(EMD) with the sample entropy, was proposed to wipe out the bend noise included in the leakage signal and to improve the accuracy of leak detection positioning. The simulation and experimental results show that the method proposed is suitable for the bend noise suppression .

Key words

leakage detection / EMD / sample entropy / 90° / bend / ANSYS

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WEN Jing，ZHANG Minzi，ZHANG Heng. Water supply pipeline leakage location in the presence of 90° bend[J]. Journal of Vibration and Shock, 2018, 37(6): 92-98

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