Dimensionless Discharge in Supercritical Flow Regime for Different Sizes of Cutthroat Flumes

Tekade, Shrikant A.; Vasudeo, Avinash D.; Ghare, Aniruddha D.; Ingle, R. N.

doi:10.1007/s13369-016-2114-6

Cited by 5 publications

(3 citation statements)

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“…By combining the original dimensionless groups [Eqs. (5)- (7)], the functional relationship of the flume can be written as: in which F 2 is a functional symbol.…”

Section: New Stage-discharge Relationshipmentioning

confidence: 99%

“…There are different approaches for measuring flow discharge in open channels. Contracting the cross section of the flow is one of the simplest and inexpensive methods for measuring flow discharge in open channels [1][2][3][4][5][6][7][8]. Among the hydraulic structures that used for flow measurement in open channels, flumes (without moving parts) are the most common in irrigation networks because of their simple geometry and ease of construction.…”

Section: Introductionmentioning

confidence: 99%

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Stage–discharge equation for simple flumes with semi-cylinder contractions

Vatankhah

Mohammadi

2020

SN Appl. Sci.

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In this study, the outflow process of a simple flume with two semi-cylinders on either side of a rectangular channel having a zero slope was studied. This can be considered as one of the simplest form of contraction in a channel so it may have a broad applicability. From a practical viewpoint, the availability of a stage-discharge equation that can be reliably applied to a wide range of discharges would be of great practical importance. To extend the range of previous available data, new experimental runs were performed. Two new stage-discharge relationships were deduced: one general relationship by considering the contraction ratio and another relationship by neglecting the contraction ratio for a specified range of this variable. The proposed general stage-discharge relationship represents a novel equation to describe the flume outflow process. Other relationship can be used by neglecting the approaching channel width for the upstream Froude number ranges from 0.11 to 0.38. Compared with the available stage-discharge relationships, the results indicate that the proposed simple relationships can be reliably used for a wide range of discharges with acceptable accuracy.

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“…By combining the original dimensionless groups [Eqs. (5)- (7)], the functional relationship of the flume can be written as: in which F 2 is a functional symbol.…”

Section: New Stage-discharge Relationshipmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Stage–discharge equation for simple flumes with semi-cylinder contractions

Vatankhah

Mohammadi

2020

SN Appl. Sci.

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“…Jesson et al (2016) performed experiments on a rectangular channel and lateral contraction was provided from each side of the channel to constrict the flow and the investigator noticed the occurrence of critical section before the end of the flume throat. Tekade et al (2016) investigated the effect of supercritical flow regime in cutthroat flume and found that the critical section does not always occur at throat of the cutthroat flume for different discharges. The present study investigates the location of the critical section for a Conical Central Baffle Flume used in a trapezoidal channel with the presumption that the critical section may occur anywhere along the baffle, not necessarily at the location of minimum constriction area.…”

Section: Introductionmentioning

confidence: 99%

An Improved Channel Flow Measurement Approach Using Conical Central Baffle Flumes

Nair

Ghare

Kapoor

2023

Preprint

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A simple and inexpensive way of channel discharge measurement is to introduce an axial obstruction in the flow cross- section, thereby creating the critical flow conditions. Such flow measuring devices are referred to as baffle flumes. Literature showed that the critical flow conditions are routinely assumed to occur at the minimum flow cross-section in the flume, however practically the critical section lies slightly on the upstream side. This paper presents an analytical approach to deduce the discharge prediction model on the basis of identification of true location of critical flow section that lies near the vicinity of the least constricted section in the baffle flume. Using the experimental data, a relationship between the ratio of energy to critical depth and the geometrical configuration of the baffle flume having conical shaped obstruction in a trapezoidal channel section, is obtained. Coupled with the expression for critical contracted width, the location of the critical flow section is established. Numerical analysis has also been carried out to ascertain the applicability of the proposed discharge prediction model. The discharge prediction model presented herein for the Conical Central Baffle Flume, is found to provide the discharge with better accuracy (maximum error 2.49%) when compared with the Kapoor et al. (2021) model available in the literature (maximum error 5.24%). An illustrative example to demonstrate use of the proposed methodology, is also appended herein for the benefit of the field hydraulic engineers dealing with flow measurements.

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