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Revisiting frequency domain analysis method for water hammer effects on pipeline systems
Journal of the Brazilian Society of Mechanical Sciences and Engineering, 2020This paper revisits frequency domain analysis method for water hammer study in a hydraulic system. Detailed investigation of the effect of the flow parameters is conducted. Weaknesses on previous research works were pointed out. A brief presentation of the frequency response function determined from motions equations of transient water flow is firstly ...
Lazhar Ayed, Zahreddine Hafsi
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Riemann solvers for water hammer simulations by Godunov method
International Journal for Numerical Methods in Engineering, 2000The water hammer phenomenon can be described by a 2×2 system of hyperbolic partial differential equations (PDEs). Numerical solution of these PDEs using finite-volume schemes is investigated herein. The underlying concept of the Godunov scheme is the Riemann problem, that must be solved to provide fluxes between the computational cells. The presence of
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Finite Volume Method for Computation of Water Hammer in Conical Tubes
Applied Mechanics and Materials, 2014The most traditional way to calculate water hammer in the conical tube is using some small discrete equivalent uniform tubes to replace it. this approximate treatment can not show the much accurate results of the conical tube,but also not reflect the actual physical discontinuities of the system.This paper use finite volume method to integrate water ...
Xiu Long Zhao, Jian Zhang, De Shuang Yu
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Development of a Characteristic Particle Method for Water Hammer Simulation
Journal of Hydraulic Engineering, 2013AbstractA characteristic particle method is proposed to simulate a water hammer in piping systems. Two types of regular particles are designed to trace the solution evolution along their corresponding characteristic lines. Besides these regular particles, shock particles with dual states are introduced to follow the shock formed from the amalgamation ...
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International Journal of Engine Research
The pressure fluctuation in nozzle of the common rail injector directly affects the stability of fuel injection. As the pressure fluctuation often the result of coaction of multiple factors, it is difficult to carry out in-depth research.
Jing Xu +5 more
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The pressure fluctuation in nozzle of the common rail injector directly affects the stability of fuel injection. As the pressure fluctuation often the result of coaction of multiple factors, it is difficult to carry out in-depth research.
Jing Xu +5 more
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Water Hammer Modeling Using 2nd Order Godunov Finite Volume Method
2009Analyzing and interpreting the water-hammer (unsteady flow) phenomena in a pipeline are not easy tasks. For complicated cases, the governing partial differential equations can only be solved numerically. Various numerical approaches have been introduced for pipeline transient calculations.
Saeed-Reza Sabbagh-Yazdi +2 more
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Numerical Analysis of Pipeline Equipment Effect on Water Hammer Using Characteristic Method
Volume 1: Fora, Parts A, B, C, and D, 2003In this attempt effect of pipeline equipment behavior was considered on water hammer numerically. The effect includes opening / closing of the shut off valves, loss of coefficient of the outlet bypass pipe for the air chamber, elasticity of the pipeline and loss coefficient due to friction. In order to study the behavior, mass and momentum conservation
Mohammad R. Ansari, Abdolreza Davari
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IEEE Transactions on Sustainable Energy
The water hammer effect in a hydroturbine and improper setting of the PID parameters of a governor can cause a hydropower unit to provide negative damping to the corresponding hydro power generation system, affecting its frequency.
Hongchun Shu +5 more
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The water hammer effect in a hydroturbine and improper setting of the PID parameters of a governor can cause a hydropower unit to provide negative damping to the corresponding hydro power generation system, affecting its frequency.
Hongchun Shu +5 more
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Water
This study addresses the water hammer protection challenges in the JH gravity-fed bifurcated pipeline network system in Xinjiang, China. A hydraulic transient numerical model is developed using the one-dimensional method of characteristics and ...
Yunpeng Zheng +3 more
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This study addresses the water hammer protection challenges in the JH gravity-fed bifurcated pipeline network system in Xinjiang, China. A hydraulic transient numerical model is developed using the one-dimensional method of characteristics and ...
Yunpeng Zheng +3 more
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Water
The safe operation of drainage pumping stations, which are core flood-control facilities in eastern coastal areas of China, is paramount due to frequent typhoons and short-duration heavy rainfall.
Runlong Zhang +8 more
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The safe operation of drainage pumping stations, which are core flood-control facilities in eastern coastal areas of China, is paramount due to frequent typhoons and short-duration heavy rainfall.
Runlong Zhang +8 more
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