Features of the passage of wave signals through a layer with vapor-gas bubbles in a liquid

Abstract

In many technological processes, accompanied by explosions and vibrations, there are urgent problems of protection against shock and noise effects on the environment. In particular, when dismantling underwater objects (for example, oil and gas pipelines), explosion energy is often used. There are requirements for compliance with safety rules and environmental standards. To protect underwater flora and fauna, as well as other objects in various technological processes from the effects of shock waves, you can use “veils” with bubbles. Here we study the effect of a bubble “veil” in a liquid on mitigating the effects of pressure waves. The paper presents the results of studying dynamics of a wave signal passing through vapor-gas bubble “curtains” in a liquid, taking into account heat and mass transfer on the interfacial surface in an acoustic approximation. Based on numerical calculations, using the fast Fourier transform method, wave patterns for the evolution of pressure pulses are obtained, and the influence of various parameters of the state of a liquid with vapor-gas bubbles on the reflection and passage of acoustic waves through the "veil” is analyzed.In this paper, the evolution of acoustic waves when passing through a liquid layer containing vapor-gas bubbles is considered. The regularities of propagation and attenuation of harmonic waves in a liquid containing vapor-gas bubble “vails” and the features of wave dynamics depending on the temperature of the liquid, the size of the bubbles, the volume content and the thickness of the “vail” are analyzed.