Propagation of Disturbance through a Gas Plug Enclosed by Liquid in a Pipe

Abstract

The disturbance propagating thorough a single gas plug bounded by liquid on both sides in a pipe is considered on the basis of the linearized theory in ordinary gasdynamics. The temporal and spatial features of the propagation in such a two-phase system are discussed analytically and numerically. It is explicitly shown that there are two characteristic times of the propagation and that the transmission through a plug is promoted with the strength of a disturbance. A similar discussion can be applied to a liquid plug bounded by gas on both sides.