A leakage particle–wall impingement based vibro-acoustic characterization of the leaked sand

Wang, K., Hu, Y., Qin, M., Liu, G., Li, Y., & Wang, G. (2021). A leakage particle–wall impingement based vibro-acoustic characterization of the leaked sand–gas pipe flow. Particuology, 55, 84-93. https://doi.org/10.1016/j.partic.2020.07.005

A leakage particle–wall impingement based vibro-acoustic characterization of the leaked sand–gas pipe flow

Kai Wang ^a *, Yinan Hu ^a, Min Qin ^b, Gang Liu ^a, Yichen Li ^a, Gang Wang ^a

a School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China
b Metering Test Center, China Academy of Engineering Physics, Mianyang 621900, China

10.1016/j.partic.2020.07.005

Volume 55, April 2021, Pages 84-93

Received 14 April 2020, Revised 16 July 2020, Accepted 29 July 2020, Available online 25 August 2020, Version of Record 3 February 2021.

E-mail: wangkai@upc.edu.cn

Highlights

• Vibro-acoustic features of sand leakage from gas flow are analysed by contrast.

• Sand leakage vibro-acoustic feature is differentiated by a time-frequency method.

• A good correlation between the vibro-acoustic features and leak conditions is found.

• Different advantages of the acoustic and vibration sensor methods are presented.

Abstract

Solid particle leakage detection in double-wall pipes is industrially important, especially in chemical and petroleum engineering. Here, we developed vibration and acoustic sensor approaches for the characterization and comparative study of the applicability of leakage sand particle detection from the flow of gas pipes. A specific wideband vibration sensor and pressure-field microphone were selected to identify the vibro-acoustic characteristics within 50 kHz of the particle leakage. The vibro-acoustic time-behaviours and characteristic frequencies of particle leakage were observed by the time-frequency method. The leakage gas flow noise was verified by coherence analysis and minimized by a digital bandpass and band-elimination filter. Corresponding experiments were performed, and good agreement was found between the release pressures (0.1–0.3 MPa) with different leak sizes (0–8 mm) under different sand masses (120 μm) and vibro-acoustic Root-Mean-Square (RMS) levels. In the comparison of the two methods, the vibration method has a better frequency response for the leakage flow and is good for identifying whether there are particle leaks. The acoustic method has a time behaviour response and is good for establishing the relationship between the particle mass and signals. In addition, the acoustic method has frequency shift features with a better signal to noise ratio. The acoustic method lays the foundation for future work of more complex leakage detection combining the advantages of vibration and the acoustic method.

Graphical abstract

Keywords

Solid particle detection; Vibration and acoustic; Sand–gas flow; Pipe leak

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