WATER HAMMER IN PIPELINE WITH DIFFERENT CHARACTERISTICS OF VALVE CLOSING AND UNSTEADY WALL FRICTION

Authors

  • Haixiao Jing State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China (Xi'an University of Technology), Xi‘an, China
  • Wen Wang State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China (Xi'an University of Technology), Xi‘an, China
  • Guodong Li State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China (Xi'an University of Technology), Xi‘an, China

DOI:

https://doi.org/10.14311/CEJ.2019.01.0011

Keywords:

Water hammer; Laplace transform; Valve closing laws; Unsteady wall friction

Abstract

This paper presents an analytical investigation of water hammer pressure variation in a reservoir-pipe-valve system. Laplace transform method is used to get the analytical solutions for different characteristics of the valve closing. Specifically, sudden valve closing and piecewise linear closing are used, the latter can be treated as approximated arbitrary characteristics of valve closing. Unsteady wall friction is also included. The new solutions compare well with the previous experimental data. The results show that this solution is suitable for water hammer with laminar and low Reynolds number turbulent unsteady flow. The effects of different characteristics of the valve closing on the water hammer pressure variations are also studied. This solution can be a better choice for optimization of valve closing to reduce the maximum water hammer pressure.

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Published

2019-04-30

How to Cite

Jing, H., Wang, W., & Li, G. (2019). WATER HAMMER IN PIPELINE WITH DIFFERENT CHARACTERISTICS OF VALVE CLOSING AND UNSTEADY WALL FRICTION. Stavební Obzor - Civil Engineering Journal, 28(1). https://doi.org/10.14311/CEJ.2019.01.0011

Issue

Vol. 28 No. 1 (2019)

Section

Articles

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