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Transitional flow between orifice an...

Utah State University., Biological and Irrigation.

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Transitional flow between orifice and non-orifice regimes at a rectangular canal gate.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Transitional flow between orifice and non-orifice regimes at a rectangular canal gate./
Author:	Alminagorta Cabezas, Omar.
Description:	93 p.
Notes:	Adviser: Gary Merkley.
Contained By:	Masters Abstracts International46-05.
Subject:	Engineering, Agricultural. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1450332
ISBN:	9780549470809

Transitional flow between orifice and non-orifice regimes at a rectangular canal gate.
Alminagorta Cabezas, Omar.

Transitional flow between orifice and non-orifice regimes at a rectangular canal gate. - 93 p.

Adviser: Gary Merkley.

Thesis (M.S.)--Utah State University, 2008.

The main objective of this research was to analyze the hydraulic transition between non-orifice and orifice flow regimes at a rectangular sluice gate through the calibration of various discharge equations, and determining the value of a coefficient, which defines the transition between orifice and non-orifice flow conditions. The second objective was to determine whether a single equation could be used to represent the stage-discharge relationship for both free and submerged non-orifice flow through a rectangular sluice gate.

ISBN: 9780549470809Subjects--Topical Terms:

1019504
Engineering, Agricultural.

Transitional flow between orifice and non-orifice regimes at a rectangular canal gate.
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005 20100709
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020 $a 9780549470809
035 $a (UMI)AAI1450332
035 $a AAI1450332
040 $a UMI $c UMI
100 1 $a Alminagorta Cabezas, Omar. $3 1023681
245 1 0 $a Transitional flow between orifice and non-orifice regimes at a rectangular canal gate.
300 $a 93 p.
500 $a Adviser: Gary Merkley.
500 $a Source: Masters Abstracts International, Volume: 46-05, page: 2759.
502 $a Thesis (M.S.)--Utah State University, 2008.
520 $a The main objective of this research was to analyze the hydraulic transition between non-orifice and orifice flow regimes at a rectangular sluice gate through the calibration of various discharge equations, and determining the value of a coefficient, which defines the transition between orifice and non-orifice flow conditions. The second objective was to determine whether a single equation could be used to represent the stage-discharge relationship for both free and submerged non-orifice flow through a rectangular sluice gate.
520 $a Several hundred data sets were collected in a hydraulic laboratory, each including the measurement of water upstream depth and downstream for five different gate openings, and 17 different steady-state discharges, from 0.02 to 0.166 m3/s. Three approaches were used to define the limits of the non-orifice-to-orifice regime transition: (1) using an empirical equation; (2) using the traditional submerged non-orifice equation; and (3) using the specific-energy equation for open-channel flow. Based on the results of this research, the latter approach was ultimately chosen to define the boundaries of the transition between orifice and non-orifice flow regimes.
520 $a Once the transition limits were defined, the estimation of the non-orifice-to-orifice transition coefficient, Co, was made. The transition coefficient was defined as the ratio of gate opening to upstream water depth. The experimental results indicate that orifice flow always exists when C o is less than 0.83, and non-orifice flow always exists when C o is greater than 1.00. To identify the flow regime (orifice or non-orifice) within the range 0.83 < Co < 1.00, it is necessary to consider the submergence, S, which is the ratio of downstream to upstream water depth.
520 $a With respect to the second objective, laboratory data for non-orifice flow regimes were used to test several different empirical equation forms that could potentially represent both free and submerged flow conditions. The strategy was to find a relationship among flow rate, upstream depth, downstream depth, and submergence. As a result of the analysis, one particular equation form was found to have a relatively high coefficient of determination and low standard error of the estimate. This equation fits the laboratory data for submergences up to 0.87 with a discharge error not exceeding +-10%.
590 $a School code: 0241.
650 4 $a Engineering, Agricultural. $3 1019504
650 4 $a Engineering, Civil. $3 783781
690 $a 0539
690 $a 0543
710 2 $a Utah State University. $b Biological and Irrigation. $3 1023680
773 0 $t Masters Abstracts International $g 46-05.
790 $a 0241
790 1 0 $a Merkley, Gary, $e advisor
790 1 0 $a Urroz, Gilberto $e committee member
790 1 0 $a Walker, Wynn $e committee member
791 $a M.S.
792 $a 2008
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1450332