Investigation of effective parameters (pipe diameter and fluid velocity) on the Simulation of water hammer phenomenon in water pipeline

Subject Areas : Fluid Mechanic

Nima Asadi Dehmirahmadi ¹ , Yousof Esmaeili ²

1 - Engineer
2 - Engineer

Received: 2018-11-04 Accepted : 2018-12-16 Published : 2019-02-20

Keywords: Velocity, empirical method, water hammer, hammer software, pipe diameter,

Abstract :

Due to the importance of water hammer in pipe network and pipe containing liquids in this paper, the diameter of pipe and the velocity of fluid were considered experimentally in laboratory and simulated the problem in HAMMER software. In this study, the tests were carried out with six different types of materials (Brass, Carbon Steel, Copper, Five layer and PVC). It was assumed that valve which causes water hammer was closed fast. Also, how valve closing, is another important issue for this phenomenon. The tests in two modes slow and fast closing valve results showed if it takes more time to close, water hammer is less and the waves would fade faster. Also by examining the results indicate that the diameter of the pipes increasing pipe's diameter, increases the mess flow and fluid's velocity therefore effect of water hammer increases. This phenomenon shows that effect of increasing fluid velocity is more powerful than increasing pipe diameter.