Investigation of critical submergence at single and multiple- horizontal intake structures having air- entraining vortices

Download

index.pdf

Date

2015

Author

Gökmener, Serkan

Metadata

Show full item record

Item Usage Stats

297
views

126
downloads

In this experimental study the variation of the critical submergence of air- entraining vortices with important flow and geometrical parameters were investigated at single and multiple- horizontal intake structures. In the scope of this study, three identical pipes of diameter Di=0.265 m were tested at a wide range of discharge with varying side wall clearances under symmetrical and asymmetrical approach flow conditions. Using dimensional analysis dimensionless equation was developed for critical submergence as a function of relevant flow and geometrical parameters. Regression analysis was used to derive empirical equations for the critical submergence. Moreover, these empirical equations were compared with the similar studies in the literature. Results of the experiments show that, for a given Froude number, the critical submergence values are higher for multiple water intake structures than those of single water intake structures. By using these equations it is possible to determine the required critical submergence depths above which there will be no air- entraining vortices, at single and multiple- horizontal intakes within the ranges of dimensionless parameters tested in this study. Moreover, floating rafts at different sizes were tested as anti- vortex devices to prevent the formation of air- entraining vortices and very successful results were achieved.

Subject Keywords

Intakes (Hydraulic engineering)., Hydraulic engineering., Vortex-motion., Fluid Dynamics., Hydrodynamics.

URI

http://etd.lib.metu.edu.tr/upload/12619713/index.pdf
https://hdl.handle.net/11511/25400

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Determination of critical submergence depth at horizontal intakes Haspolat, Emre; Göğüş, Mustafa; Köken, Mete; Department of Civil Engineering (2015) The purpose of the study is to investigate the formation of air entraining vortices under both symmetrical and asymmetrical approach flow conditions in an experimental setup of a horizontal water intake structure composed of a reservoir-pipe system. To determine at which critical submergence the air entraining vortices forming; a series of experiments were conducted in the experimental setup with horizontal pipes of four different diameters. Approach channel side walls of the intake structure model are adju...
Forced hydraulic jump on artificially roughened beds Şimşek, Çağdaş; Tokyay, Nuray; Department of Civil Engineering (2006) In the scope of the study, prismatic roughness elements with different longitudinal spacing and arrangements have been tested in a rectangular flume in order to reveal their effects on fundamental characteristics of a hydraulic jump. Two basic roughness types with altering arrangements have been tested. Roughness elements of the first type extends through the channel width against the flow with varying length and pitch ratios for different arrangements. The second type is of staggered essence and produced b...
Effect of approach channel shape on theformation of vortices at single-horizontal intakes Sönmez, Can Metin; Göğüş, Mustafa; Department of Civil Engineering (2019) In an experimental setup of a water intake structure composed of a reservoir-pipe system, the formation of air-entraining vortices under symmetric flow conditions were investigated for different approach channel shapes. In the first set of the experiments the approach channel walls were kept parallel to each other and be perpendicular to the head-wall of the intake structure. In the following sets of the experiments these walls were located at different angles to the head-wall. A series of experiments were ...
Effect of hydraulic parameters on the formation of vortices at intake structures Baykara, Ali; Göğüş, Mustafa; Köken, Mete; Department of Civil Engineering (2013) The aim of this experimental study was to investigate the hydraulic conditions at which air-entraining vortices would form in front of horizontal intakes and to determine the ways of eliminating the formation of these vortices by testing anti-vortex devices. For these reasons, a series of experiments were conducted in an experimental setup composed of a reservoir having the dimensions of 3.10 m x 3.10 m x 2.20 m and a pump connected to the intake pipe. Within the reservoir, between the concrete side walls a...
Determination of hydraulic parameters of semi-infinite aquifers using Marquardt algorithm Taşkan, Cüneyt; Önder, Halil; Department of Civil Engineering (2004) In this study, transmissivity and storage coefficient of a semi-infinite, confined, homogeneous and isotropic aquifer, where the flow is one-dimensional and linear, are determined using Marquardt algorithm, considering two independent cases: constant drawdown in the adjacent stream; or constant discharge from the aquifer due to pumping at a constant rate. In the first case piezometric head and discharge measurements are utilized. Hydraulic diffusivity, which is the ratio of transmissivity to storage coeffic...

Citation Formats

S. Gökmener, “Investigation of critical submergence at single and multiple- horizontal intake structures having air- entraining vortices,” M.S. - Master of Science, Middle East Technical University, 2015.