ABSTRACT
Tp = pipe thickness (m),Ep = pipe module of elasticity (kg/m2) Ew = module of elasticity of water (kg/m2), C1=pipe support coefficient
T = time (s),Y = depends on pipeline support-characteristics and Poisson’s ratio
2.1 INTRODUCTION
Pump pulsation, due to interpenetration of two fluids, such as hydrodynamics instability is a very loud banging, knocking, or hammering noise in the pipes that occurs when the flow is suddenly turned off. Pump pulsation is a sound like human heart by fluid pulsation in the pipe. This chapter refers to pump pulsation as a fluid transient in a “Dynamic” operating case, which may also include pulsation by fluid reciprocating or peristaltic positive displacement, sudden thrust due to relief valves that pop open or rapid piping accelerations due to an earthquake. It is advisable to investigate fluidstructure interpenetration (FSI) that can develop for dynamic cases but the decision to undertake such analysis is largely up to the designer; except for boilers or nuclear installations (Figure 2.1).
