Analysis on Air Valve Placement in Long-Distance Water Conveyance Pipeline System

Abstract:

Water hammer is one of the key factors that can cause accidents by the burst of pressure pipeline. Important features and related reasons of accidents caused by water hammer in long-distance water conveyance pipeline system were introduced, and protection measures were presented. An long-distant raw water conveyance pipeline project was taken as an example to study on the influence of protective effect by different placement schemes of air valves based on hydraulic transient simulation and analysis. Results shows that largest number of air valves does not reach the best and unreasonable placement of air valves might be the cause of an accident. It is critical to select the proper location of air valves, it is necessary to pay more attention on local hump in the front of pipeline near the pump and put exhaust valves instead of inlet valves at the back of pipeline (except some higher hump location).

• Periodical: Advanced Materials Research (Volumes 610-613)
• Pages: 2513-2518
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.610-613.2513
• Online since: December 2012
• Authors: Shi Feng Huang, Feng Wang, Hui Xu, Xiao Xian Wei
• Keywords: Air Valve Placement, Hydraulic Transient Process, Potential Dangerous Location, Pressure Pipeline, Water Hammer

References

[1] Wylie E. B, Streeter V. L., Lisheng Suo. Fluid Transients in Systems, M. Englewood Cliffs, NJ, Prentice Hall, 1993.

[2] Guanglin Liu, Meiqing Liu, Xuheng Kuang. Study on water hammer and protection in long pipeline system(In Chinese), J. Journal of Wuhan university of hydraulic and electric engineering, 1996, (5).

[3] Yuan Zheng, Lisheng Suo, etc. Research on gas properties and current rush to interception air-mass in delivery pipeline system(In Chinese), J. Advances In Water Science, 2005, (06).

[4] Yuan Zheng, Deyou Liu. Gas-liquid two phase transient flows in pressurized water conveyance pipe system(In Chinese), J. Journal of Hehai University (Natural Sciences), 2002, (06).

[5] Deyou Liu, Lisheng Suo. Rigid model for transient flow in pressurized pipe system containing trapped air mass(In Chinese), J. Advances In Water Science, 2004, (06).

[6] Bilu Yu. The Investigation and Development on Water Hammer with a Low Gas Content(In Chinese), J. Fluid Machinery, 1992, (5).

[7] Kessal, M., Amaouche, M. Numerical Simulation of Transient Vaporous and Gaseous Cavitation in Pipelines, J. International Journal of Numerical Methods for Heat&Fluid Flow, 2001.

DOI: 10.1108/09615530110381557

[8] Lanfeng Sun. Research on the Application of Water Hammer Protection of Air Valves in Long Water Supply Systems(In Chinese), D. Master paper of Wuhan University, 2005.