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Spectral Characteristics of Acoustic Noise During Air Filtration in Highly Permeable Porous Samples
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, Saint Petersburg 2020, Nov 2020, Volume 2020, p.1 - 5
Abstract
Filtration of fluids in porous media leads to the generation of acoustic noise. The spectra of such noises are determined by the physical properties of porous media. In this work, we studied the spectral characteristics of air filtration noise in highly permeable porous samples. The characteristic features of the obtained spectra are established. In particular, the effect of sequentially switching off the frequency bands in the spectrum with a decrease in the pressure drop was found. It is established that the dependence of the filtration noise intensity is piecewise linear. Moreover, the tangent of the angle of inclination depends on the permeability of the porous medium. The results can be used to develop a theory of filtration noise in saturated porous media.