Journal of the Korean Society for Geothermal and Hydrothermal Energy (한국지열·수열에너지학회논문집)

Korean Society for Geothermal and Hydrothermal Energy (한국지열·수열에너지학회)
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Effect of Design Factors in a Pump Station on Pressure Variations by Water Hammering

가압 펌프장에서 설계인자들이 수격에 의한 압력변동에 미치는 영향

  • Park, Jong-Hoon (Graduate School of Convergence Science, SeoulTech) ;
  • Sung, Jaeyong (Department of Mechanical and Automotive Engineering, SeoulTech)
  • 박종훈 (서울과학기술대 융합과학대학원) ;
  • 성재용 (서울과학기술대학교 기계자동차공학과)
  • Received : 2021.08.16
  • Accepted : 2021.10.01
  • Published : 2021.12.01
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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.

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References

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