scholarly journals Investigation of Water Hammer Effect Through Pipeline System

2012 ◽  
Vol 2 (3) ◽  
pp. 246 ◽  
Author(s):  
Tan Wee Choon ◽  
Lim Kheng Aik ◽  
Lim Eng Aik ◽  
Teoh Thean Hin
Keyword(s):  
Water Hammer ◽  
Pipeline System ◽  
Water Hammer Effect

scholarly journals Hydraulic Transients in Viscoelastic Pipeline System with Sudden Cross-Section Changes

Energies ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 4071
Author(s):  
Michał Kubrak ◽  
Agnieszka Malesińska ◽  
Apoloniusz Kodura ◽  
Kamil Urbanowicz ◽  
Michał Stosiak
Keyword(s):  
Numerical Model ◽  
Cross Section ◽  
Laboratory Data ◽  
Experimental Studies ◽  
Distribution Networks ◽  
Water Hammer ◽  
Fluid Distribution ◽  
Pipeline System ◽  
Hydraulic Transients ◽  
Single Pipe

It is well known that the water hammer phenomenon can lead to pipeline system failures. For this reason, there is an increased need for simulation of hydraulic transients. High-density polyethylene (HDPE) pipes are commonly used in various pressurised pipeline systems. Most studies have only focused on water hammer events in a single pipe. However, typical fluid distribution networks are composed of serially connected pipes with various inner diameters. The present paper aims to investigate the influence of sudden cross-section changes in an HDPE pipeline system on pressure oscillations during the water hammer phenomenon. Numerical and experimental studies have been conducted. In order to include the viscoelastic behaviour of the HDPE pipe wall, the generalised Kelvin–Voigt model was introduced into the continuity equation. Transient equations were numerically solved using the explicit MacCormack method. A numerical model that involves assigning two values of flow velocity to the connection node was used. The aim of the conducted experiments was to record pressure changes downstream of the pipeline system during valve-induced water hammer. In order to validate the numerical model, the simulation results were compared with experimental data. A satisfactory compliance between the results of the numerical calculations and laboratory data was obtained.

Optimum Selection of Hydraulic Devices for Water Hammer Control in the Pipeline Systems Using Genetic Algorithm

2003 ◽  
Author(s):  
Bong Seong Jung ◽  
Bryan W. Karney
Keyword(s):  
Genetic Algorithm ◽  
Steady State ◽  
Optimization Problems ◽  
System Optimization ◽  
Water Hammer ◽  
Pipeline System ◽  
Optimal Size ◽  
Protection Strategy ◽  
Hydraulic Devices ◽  
Selection Of

Genetic algorithms have been used to solve many water distribution system optimization problems, but have generally been limited to steady state or quasi-steady state optimization. However, transient events within pipe system are inevitable and the effect of water hammer should not be overlooked. The purpose of this paper is to optimize the selection, sizing and placement of hydraulic devices in a pipeline system considering its transient response. A global optimal solution using genetic algorithm suggests optimal size, location and number of hydraulic devices to cope with water hammer. This study shows that the integration of a genetic algorithm code with a transient simulator can improve both the design and the response of a pipe network. This study also shows that the selection of optimum protection strategy is an integrated problem, involving consideration of loading condition, device and system characteristics, and protection strategy. Simpler transient control systems are often found to outperform more complex ones.

Hydraulic descaling improvement, findings of jet structure on water hammer effect

2007 ◽  
Vol 104 (2) ◽  
pp. 84-90 ◽  
Author(s):  
M. Raudensky ◽  
A. Horak ◽  
J. Horsky ◽  
M. Pohanka ◽  
P. Kotrbacek
Keyword(s):  
Water Hammer ◽  
Jet Structure ◽  
Water Hammer Effect

New Designs in Fuel Dispensing System to Reduce Water Hammer

2013 ◽  
Author(s):  
Y. J. Liu ◽  
Z. Y. Wang ◽  
Z. Y. Huang ◽  
J. Lumkes
Keyword(s):  
Working Conditions ◽  
Rate Control ◽  
Water Hammer ◽  
Service Station ◽  
Start Up ◽  
Flow Rate Control ◽  
The Impact ◽  
Water Hammer Effect ◽  
Rapid Pressure ◽  
Nozzle Structure

Dispensers are used for refueling vehicles at the service station. During the refueling process, the velocity of fluid changes rapidly in several working conditions, which results in a rapid pressure increasing or a water hammer effect occurring. Water hammer, often causes leakage or failure of dispensers, occurs due to pump start-up and shut-down, valves opening or closing during the refueling process. This paper experimentally characterized and theoretically calculated the impact of water hammer on the dispensers at the service station. New designs of nozzle structure and new flow-rate control modes are made to reduce the water hammer in the fuel dispensing system. Eventually, all the water hammers are reduced significantly during the refueling process under the new design modes.

Applying PID control strategy for preventing damage caused by Water Hammer effect in an experimental hydraulic pumping system

2015 ◽  
Author(s):  
Erick Melo Rocha ◽  
Ábner César Santos Bezerra ◽  
Walter Barra Junior ◽  
José Augusto Lima Barreiros
Keyword(s):  
Control Strategy ◽  
Pid Control ◽  
Water Hammer ◽  
Pumping System ◽  
Water Hammer Effect

Enlargement of basilar artery aneurysms following balloon occlusion — “water-hammer effect”

1991 ◽  
Vol 75 (6) ◽  
pp. 963-968 ◽  
Author(s):  
Eddie S. K. Kwan ◽  
Carl B. Heilman ◽  
William A. Shucart ◽  
Richard P. Klucznik
Keyword(s):  
Basilar Artery ◽  
Water Hammer ◽  
Balloon Occlusion ◽  
Successful Therapy ◽  
Content Type ◽  
Aneurysm Neck ◽  
Water Hammer Effect ◽  
Fine Print

✓ Two patients with distal basilar aneurysms were treated with intra-aneurysmal balloon occlusion. After apparently successful therapy, follow-up angiograms demonstrated aneurysm enlargement with balloon migration distally in the sac. Geometric mismatch between the base of the balloons and the aneurysm neck together with transmitted pulsation through the 2-hydroxyl-ethylmethacrylate (HEMA)-filled balloon directly contributed to aneurysm enlargement. In this report, the authors discuss the problems of progressive aneurysm enlargement due to a “water-hammer effect” and the possibility of hemorrhage following subtotal occlusion.

Study on water hammer effect on defective tubing failure in high pressure deep gas well

2019 ◽  
Vol 106 ◽  
pp. 104154 ◽  
Author(s):  
Yisheng Mou ◽  
Zhanghua Lian ◽  
Pengfei Sang ◽  
Hao Yu ◽  
Qiang Zhang ◽  
...  
Keyword(s):  
High Pressure ◽  
Water Hammer ◽  
Gas Well ◽  
Water Hammer Effect
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