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114533

EFFECT OF PIPES NETWORKS SIMPLIFICATION ON WATER HAMMER PHENOMENON

Article

Last updated: 23 Jan 2023

Subjects

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Tags

Civil Engineering: structural, Geotechnical, reinforced concrete and s…nd sanitary engineering, Hydraulic, Railway, construction Management.

Abstract

Simplification is an important design step of water supply and irrigation pipes networks. It is recognized by making the original network easier to be understood and analyzed. Water hammer in water-supply networks may give rise to high and low pressures, due to the superposition of reflected pressure waves. The effect of pipes networks' simplification on water hammer phenomenon is investigated. This study uses a simple two loops pipes network composed of 12 high density polyethylenes (HDPE) pipes with different diameters, thicknesses, and roughness coefficients representing of a general parallel/series system. The network is fed from a boundary head reservoir and loaded by either distributed or concentrated boundary water demands. According to both hydraulic and hydraulic plus water quality equivalence, three levels of simplifications on the original network are performed. Also, the effect of water demands' concentration on the transient flow is checked. The transient flow in the network is initialized by either concentrated or distributed boundary water demands which are suddenly shut-off or released. Water hammer and mass oscillation (WHAMO) software which uses the implicit finite difference scheme for solving the momentum and continuity equations at unsteady-state case is used in the simulation. All scenarios produced results showed that both hydraulic equivalence and demands' concentration simplifications increase the transient pressure and flow rate in the simplified network compared with the original one. However, hydraulic plus water quality equivalence simplification results in an adverse effect. It was found that, as the degree of simplification increases the transient pressure head and flow rate of the simplified network deviate more from those of the original network. Therefore, simplifications of the distribution networks should be done with very careful caution.

DOI

10.21608/jesaun.2012.114533

Keywords

Water Hammer, pipes network, simplification, demands variations

Authors

First Name

Hassan

Last Name

Ibrahim

MiddleName

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Affiliation

Civil Engineering Department, Faculty of Engineering, Assiut University, Assiut 71516, Egypt

Email

hassanmohamed_2000@yahoo.com

City

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Orcid

-

First Name

Ali A. M.

Last Name

Gad

MiddleName

-

Affiliation

Civil Engineering Department, Faculty of Engineering, Assiut University, Assiut 71516, Egypt

Email

-

City

-

Orcid

-

Volume

40

Article Issue

No 6

Related Issue

16872

Issue Date

2012-11-01

Receive Date

2012-07-24

Publish Date

2012-11-01

Page Start

1,625

Page End

1,647

Print ISSN

1687-0530

Online ISSN

2356-8550

Link

https://jesaun.journals.ekb.eg/article_114533.html

Detail API

https://jesaun.journals.ekb.eg/service?article_code=114533

Order

4

Type

Research Paper

Type Code

1,438

Publication Type

Journal

Publication Title

JES. Journal of Engineering Sciences

Publication Link

https://jesaun.journals.ekb.eg/

MainTitle

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Details

Type

Article

Created At

23 Jan 2023