The influence of longitudinal elastic systems on the celerity (speed of elastic waves)

Abstract

This paper presents two elastic systems which protect the pipe by reducing the celerity. We propose two options for protection: the first solution named "barrel jacket", where the wall pipe consists of an elastic inner layer soldered in the steel pipe (rubber) which has no role in resistance and the second solution named "elastic cylinder", where in the ordinary pipe, is disposed longitudinally a cilinder with small section, fabricated from an elastic material (rubber). The common idea is that the overpressure strain the elastic element and so the flow area increase while the celerity decrease. We give the formula for celerity in the both cases and two graphical representation which showes the dependence of the celerity on the given parameters.