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http://dx.doi.org/10.17664/ksghe.2021.17.4.015

Effect of Design Factors in a Pump Station on Pressure Variations by Water Hammering  

Park, Jong-Hoon (Graduate School of Convergence Science, SeoulTech)
Sung, Jaeyong (Department of Mechanical and Automotive Engineering, SeoulTech)
Publication Information
Journal of the Korean Society for Geothermal and Hydrothermal Energy / v.17, no.4, 2021 , pp. 15-27 More about this Journal
Abstract
In this study, the effect of design factors in a pump station on the pressure variations which are the main cause of water hammering has been investigated by numerical simulations. As design factors, the flow rate, Young's modulus, diameter, thickness, roughness coefficient of pipeline are considered. The relationships between the pressure variations and the design factors are analyzed. The results show that the pressure variation increases sensitively with the flow rate and Young's modulus, and increases gradually with the thickness and roughness coefficient of pipe, whereas it decreases with the pipe diameter. The wavelength of the pressure wave becomes longer for a smaller Young's modulus, a smaller pipe thickness and a bigger pipe diameter. These relationships are nondimensionalized, and logarithmic curve-fitted functions are proposed by regression analysis. Most effective factors on the nondimensional pressure variation is Young's modulus. Flow rate, roughness coefficient, relative thickness and pipe diameters are the next impact factors.
Keywords
Water hammer; Pump station; Design factors; Pressure variation; Nondimensional analysis;
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