PRESSURE TRANSIENT IN PIPE NETWORKS, SIMULATION AND ANALYSIS

Fadel Salem Gseaa; Elhadi Ibrahim Dekam

doi:10.66411/jer.v14i.216

Authors

Fadel Salem Gseaa Mechanical and Industrial Engineering Department Al-Fateh University, Tripoli, Libya Author
Elhadi Ibrahim Dekam Mechanical and Industrial Engineering Department Al-Fateh University, Tripoli, Libya Author

DOI:

https://doi.org/10.66411/jer.v14i.216

Keywords:

Transient flow, water hammer, surge protection, Network flow analysis

Abstract

The transient pressure in a pipe network with different sources of transient is investigated in this study. Hammer and AFT Impulse softwares were employed to accomplish the transient flow behavior analysis. The outputs from both softwares are in good agreement they were compared with the available published results for the same conditions. In a case study, the characteristics of the network components such as valve type, valve closing rate, pipe material, friction model and surge protection device, are found to be highly affecting the amount of pressure surge in the network. The results showed that using butterfly valves in such case lowered the maximum transient pressure head by 33% compared to that when gate valves are employed. Using two stage valve closing rates with short duration time of the first stage lowered the maximum pressure head by 41% relative to that for sudden closure. Using pipes with low elasticity, PVC pipes, decreases the maximum pressure by 30%, however, the minimum pressure is increased where the column separation is avoided

References

[1] “Bentley HAMMER V8 XM Edition User’s Guide”, Bentley Systems, Incorporated and Haestad Methods Solutions Center, 2007.

[2] Bruce E. Larock, Roland W. Jeppson, Gary Z. Watters, “Hydraulics of Pipeline Systems”, CRC Press, 2000. DOI: https://doi.org/10.1201/9781420050318

[3] Larry W. Mays, “Water Distribution Systems Handbook”, McGraw Hill Book Company, 2000.

[4] Fadel S. Gasiaa. “Pressure transient in networks, simulation and analysis”, M.Sc. thesis, Al-Fateh University,2009.

[5] Lewis A. Rossman, “EPANET 2 users manual”, US Environmental Protection Agency, September 2000