Channel Flow Measurement Using Portable Conical Central Baffle

Kapoor, Ankur; Ghare, Aniruddha D.; Vasudeo, Avinash D.; Badar, Avinash M.

doi:10.1061/(asce)ir.1943-4774.0001427

Cited by 12 publications

(13 citation statements)

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“…From the comparison, it is evident that the accuracy of discharge prediction has increased by determining the exact location of critical section rather than assuming it to lie at the throat. The proposed approach of predicting discharge also eliminates the use of discharge correction factor (Cd), which has commonly been used in the limited models (Samani et al 1993;Kapoor et al 2019;Kapoor et al 2021), available in literature.…”

Section: Comparison Of Results Of Discharge Prediction Modelsmentioning

confidence: 99%

“…where E = upstream energy, y = depth of flow at upstream, Q = flow rate, A = area of cross-section at upstream. Assuming no energy loss between the upstream and critical flow section, the upstream energy can be equated to the energy at critical section (Kapoor et al 2019).…”

Section: Methods Of Development Of Energy-critical Depth Relationshipmentioning

confidence: 99%

“…Parshall (1926) introduced an improved venturi flume called Parshall flume. After the introduction of Parshall flume many researchers Bos (1989), Replogle (1975), Hager (1985), Samani et al (1991), Badar and Ghare (2012), Kapoor et al (2019) went on to improve and simplify the method of flow measurement using various flumes. The concept of mobile or portable flume was first introduced by Hager (1985).…”

Section: Introductionmentioning

confidence: 99%

“…The circular cylinder as a baffle flume, was later used by many researchers Samani et al (1991), Samani and Magallenez (1993), Badar and Ghare (2012), Ghare and Badar (2014), Samani (2017) and Samani et al (2021), to provide discharge prediction models. The concept of use of a mobile circular cone as a baffle obstruction in trapezoidal channel was also introduced by Hager (1986) and that was later comprehensively investigated by Kapoor et al (2019). Kapoor et al (2019), proposed an analytically derived flow prediction model which predicted the flow for such a conical baffle flume within + 9 % error.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Comparison Of Results Of Discharge Prediction Modelsmentioning

confidence: 99%

Section: Methods Of Development Of Energy-critical Depth Relationshipmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

An Improved Channel Flow Measurement Approach Using Conical Central Baffle Flumes

Nair

Ghare

Kapoor

2023

Preprint

Self Cite

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“…(2) 2) is applicable for a triangular baffle with an apex angle of 75° and 0.17≤Bc/B≤0.76 (Bijankhan and Ferro, 2019). Kapoor et al (2019) developed the design criteria for a mobile conical central baffle flume. A cone-shaped structure like the central baffle has the advantage of measuring a wider range of flow rates and being more stable against the water current.…”

Section: Introductionmentioning

confidence: 99%

Portable central baffle flume

Bijankhan

Teymourkhani²,

Ferro³

2022

J. Agric. Eng.

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This paper investigated the hydraulic characteristics of the triangular central baffle (TCB) flume. Laboratory tests were carried out to determine the flume dimensions. The field applicability of the proposed portable device was examined by on-farm installation. According to the laboratory tests, when the contraction ratio, r, was less than 0.39, the flow capacity was not affected by the ratio between the flume’s floor height and the throat width. The laboratory analysis also showed that there was no significant effect of installing an entrance ramp on the stage-discharge relationship for r<0.39, while the entrance ramp increased the discharge capacity for r>0.39. The stage-discharge curve obtained based on the laboratory tests was verified using field data. The results revealed that the proposed portable flume could be used accurately to determine the flow through an unlined ditch. Practical suggestions were proposed to determine the distinguishing condition curve.

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