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.

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

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

scholarly journals Vertebrobasilar dolichoectasia induced hydrocephalus: the water-hammer effect

2015 ◽  
Vol 5 (2) ◽  
Author(s):  
Vaso Zisimopoulou ◽  
Aikaterini Ntouniadaki ◽  
Panagiotis Aggelidakis ◽  
Anna Siatouni ◽  
Stylianos Gatzonis ◽  
...  
Keyword(s):  
Surgical Intervention ◽  
Obstructive Hydrocephalus ◽  
Underlying Mechanism ◽  
Water Hammer ◽  
Imaging Studies ◽  
Presenile Dementia ◽  
Vertebrobasilar Dolichoectasia ◽  
Adjacent Structures ◽  
First Choice ◽  
Water Hammer Effect

Vertebrobasilar dolichoectasia is a clinical entity associated rarely with obstructive hydrocephalus. We present a 48-year-old male with a profound dilatation of the ventricular system due to a dolichoectatic basilar artery, as appeared in imaging studies. The patient suffered from longstanding hydrocephalus and presenile dementia. The underlying mechanism for obstructive hydrocephalus due to vertebrobasilar dolichoectasia is considered to be both a <em>water-hammer effect</em> and a direct compression of adjacent structures. We suggest prompt surgical intervention upon diagnosis as a first choice treatment in order to avoid further complications.

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