An investigation of the effect of flow characteristic on maximal level of ultrasonic oscillations at the time of pipeline valve closing

Abstract

The study of noise and vibrations of the walls of the vessel pipelines' elements is an important subject in terms of operating a vessel. Three sources of noise in vessel pipelines have been established: cavitations and release of gas under low pressure conditions; periodic oscillations of speed and pressure of the transported fluid caused mainly by the work of machines; pulsation of pressure in the turbulent flow.
The results of the experimental investigation of ultrasonic oscillations intensity changes at different levels of gate valve closing and flow rate are presented. The dependence of intensity of ultrasonic oscillations upon maximal flow velocity is approximated by linear equation.