Water Transients in Pipes Due to Value Oscillation

Abstract

Pressure transients in pipeline due to valve
vibration during closing stroke have been studied. The
presumed oscillatory motion of valve actuating element is
quiet depends on both the valve mechanical and
hydrodynamic designs in one hand and to the controller in
the other hand. Since, in almost, practical valve design and
control the oscillatory of valve closing is unavoidable. In this
computational investigation, a two-equations model with
appropriate boundary conditions have been implemented to
study the effect of valve element vibrations. The effect of
valve vibration on various flow transients has shown quiet
pronounced difference than that of the vibration free closing
process which normally assumed in-computational. It can
be withdrawn from the present study that the pressure
peaks with oscillatory valve closing stroke are as much as
twice that of oscillation free valve closing stroke.