An Implicit Approach for Numerical Simulation of Water Hammer Induced Pressure in a Straight Pipe

The current paper reports the results of a numerical simulation and experiment of ratcheting behavior of pressurized straight pipe under reversed bending. A nonlinear isotropic/ kinematic (combined) hardening model is implemented into finite element program ANSYS by writing own user subroutine in FORTRAN language. The results of the numerical simulation is compared with experimental data. A reasonable agreement is noticed between the experimental and the numerical results for the ratcheting behavior of the pressurized straight pipe subjected to reversed bending.

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Numerical simulation of flow and melting characteristics of seawater-ice crystals two-phase flow in inlet straight pipe of shell and tube heat exchanger of polar ship

Heat and Mass Transfer ◽

10.1007/s00231-018-2344-0 ◽

2018 ◽

Vol 54 (11) ◽

pp. 3345-3360 ◽

Cited By ~ 2

Author(s):

Li Xu ◽

Chang-Xu Huang ◽

Zhen-Fei Huang ◽

Qiang Sun ◽

Jie Li

Keyword(s):

Numerical Simulation ◽

Heat Exchanger ◽

Two Phase Flow ◽

Ice Crystals ◽

Phase Flow ◽

Straight Pipe ◽

Two Phase ◽

Tube Heat Exchanger ◽

Melting Characteristics ◽

Shell And Tube

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Numerical simulation and optimization on valve-induced water hammer characteristics for parallel pump feedwater system

Annals of Nuclear Energy ◽

10.1016/j.anucene.2008.08.012 ◽

2008 ◽

Vol 35 (12) ◽

pp. 2280-2287 ◽

Cited By ~ 31

Author(s):

Wenxi Tian ◽

G.H. Su ◽

Gaopeng Wang ◽

Suizheng Qiu ◽

Zejun Xiao

Keyword(s):

Numerical Simulation ◽

Water Hammer ◽

Simulation And Optimization

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Experimental and Numerical Simulation of Water Hammer

Arabian Journal for Science and Engineering ◽

10.1007/s13369-013-0942-1 ◽

2014 ◽

Vol 39 (4) ◽

pp. 2669-2675 ◽

Cited By ~ 9

Author(s):

M. R. Nikpour ◽

A. H. Nazemi ◽

A. Hosseinzadeh Dalir ◽

F. Shoja ◽

P. Varjavand

Keyword(s):

Numerical Simulation ◽

Water Hammer

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Research on Coupled Water Hammer in Hydraulic Pipe System

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.29-32.401 ◽

2010 ◽

Vol 29-32 ◽

pp. 401-406 ◽

Cited By ~ 2

Author(s):

Jin Jun Liao ◽

Bao Ren Li

Keyword(s):

Numerical Simulation ◽

Pressure Fluctuations ◽

Mathematic Model ◽

Water Hammer ◽

One Dimensional ◽

Pipe System ◽

System Parameters ◽

Simulation And Experiment ◽

Pressure Characteristics

A one-dimensional mathematic model is presented which describes pressure fluctuations behavior of liquid-filled pipes. The model is based on conventional two-equations water hammer theory. Here is multi-water-hammer occurring simultaneously and coupling together. The differences are obvious when taking into account coupled water hammer and just single water hammer in Fluid pipe system by comparing the numerical simulation. The pressure characteristics located where water hammer takes place is investigated by numerical simulation and experiment. Then the factors of influencing on the coupled water-hammer pressure and frequency are considered, the result shows that system parameters effecting on it are critical and should be detailedly analyzed.

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Numerical Simulation and Analysis of Hydraulic Excitation System Based on Water Hammer by the Method of Characteristics

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.295-297.2210 ◽

2011 ◽

Vol 295-297 ◽

pp. 2210-2215 ◽

Cited By ~ 2

Author(s):

Hui Xian Zhang ◽

Zi Ming Kou ◽

Juan Wu ◽

Chun Yue Lu

Keyword(s):

Numerical Simulation ◽

Method Of Characteristics ◽

Experimental System ◽

Water Hammer ◽

Vibration Exciter ◽

Transient Pressure ◽

Excitation System ◽

The Method Of Characteristics ◽

System Pressure ◽

Excitation Pressure

To study artificially produced and actively controlled water hammer wave caused by hydraulic vibration exciter, a mathematical model was established and an experimental system was designed to verify it. Through the given partial differential equations, a computer code based on the method of characteristics was developed to calculate transient pressure distributed along the pipe under different rotational frequency of vibration exciter. The numerical simulation indicates that there is a simple harmonic vibration rising at the cross sections along the pipe, corresponding to different excitation pressure at every cross section. In addition, the excitation pressure can also be adjusted by system pressure via overflow valve. So, this work is expected to serve for the optimum design of the hydraulic excitation system and play a theoretical guiding role to experimental research in future.

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