STUDY CONCERNING THE DAMPING OF PRESSURE WAVE PROPAGATION IN ADIABATIC EVOLUTION

Abstract

The propagation of acoustic waves affects people’s daily life but especially the working conditions in certain industrial areas, including in the chemical and food sectors. In order to dampen noise and to improve the quality of the working environment, the phenomenon of pressure wave propagation must be studied. The paper analyzes the unidirectional pressure waves produced by a pneumatic machine operating at a constant speed. The hyperbolic equations with non-linear derivatives were studied using the method of finite difference and an original program was created to obtain the visualisation of the speed and pressure oscillations along the pipeline. The graphical representations of the oscillation speed and the pressure wave at different sections along the pipe have led to interesting conclusions that could be used to develop methodologies and systems for attenuating the pressure pulsation and therefore the noise.

Keywords

• attenuation of noise
• finite difference method
• pneumatics
• wave propagation