Original scientific paper

https://doi.org/10.17559/TV-20130709220632

The effects of oscillating nozzle on Christiansen’s uniformity coefficient

Ognjen Gabrić orcid.org/0000-0003-2316-6233 ; Faculty of Civil Engineering Subotica, Kozaracka 2a, 24000 Subotica, Republic of Serbia
Dušan Prodanović ; Faculty of Civil Engineering Belgrade, Bulevar Kralja Aleksandra 73, 11000 Beograd, Republic of Serbia
Jasna Plavšić orcid.org/0000-0001-9679-8851 ; Faculty of Civil Engineering Belgrade, Bulevar Kralja Aleksandra 73, 11000 Beograd, Republic of Serbia

Abstract

Rainfall simulators have been used in research for more than 40 years. Unfortunately, there is not much literature on their construction and calibration. This paper presents a rainfall simulator experimental rig, developed at the Faculty of Civil Engineering in Subotica, and its calibration, i.e. determination of rainfall distribution over the surface. The simulator uses six VeeJet 80100 oscillating nozzles equally spaced with 100 cm distance along a horizontal pipe. A box for rainfall intensity reduction is placed under each nozzle. The maximum rainfall intensity that can be achieved is 3,1 mm/min and maximum surface covered by the simulator is 1×6 m2. As a measure of uniformity of rainfall distribution over the surface, the Christiansen’s uniformity coefficient was used. For surface widths ranging from 0,1 to 1 m, the Christiansen’s coefficient varies from 0,8 to 0,9 for the oscillating nozzles, while for the non-oscillating nozzle it has a value of 0,46.

Keywords

oscillating nozzle; rainfall simulator; uniformity coefficient

Hrčak ID:

149369

URI

https://hrcak.srce.hr/149369

Publication date:

14.12.2015.

Article data in other languages: croatian

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