Energy dissipation for supercritical flows by using screens with triangular shape openings

Singh, Ujjawal Kumar; Roy, Parthajit

doi:10.1080/09715010.2022.2107880

Cited by 3 publications

(1 citation statement)

References 12 publications

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“…According to the studies, use of screens increased energy dissipation efficiency by 400-900% compared to a plain inclined drop (Norouzi et al 2011). Singh and Roy (2022) used screens both single and double wall mode with triangular shape of opening having porosity of 45% per unit depth to reduce the energy of supercritical flow with Froude number (F 1 ) varied from 3 to 19 and reported that screens with triangular shape of openings are also equally efficient with screens having circular and square shape of openings. Figure 1 presents the details of the above investigations and their findings in terms of relative energy dissipation by using perforated screens in the case of small hydraulic structures.…”

Section: Introductionmentioning

confidence: 99%

Energy dissipation in hydraulic jumps using triple screen layers

Singh

Roy

2022

Appl Water Sci

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In the present study, series of laboratory experiments were conducted to investigate the effectiveness of perforated screens as energy dissipators in mixed triple wall mode in the case of small hydraulic structures. The shapes of openings for each layer of screens were either circular, square or triangular. Every layer of the screen had a porosity of 45% per unit depth of the screen. The experiments were conducted to dissipate the energy for supercritical flows of Froude number F1 ranging from 3.2 to 19.3. The screens were placed vertically with the first screen 1.5 m from the sluice gate and consecutive screen at a gap of 25 mm. The experiments showed that the energy of the supercritical flows can be dissipated effectively by using perforated screens. The difference in energy dissipation between the upstream and downstream of the screen was more significant than the energy dissipation caused by classical hydraulic jumps. Comparing the results of the present study with the previous researchers it is found that the energy loss in case of present study more than the previous researchers. The relative energy loss in the present study was found to be varying from 74 to 94%. The value of the Froude number downstream of the screen, F2, was varying from 1.1 to 1.81, with an average value of 1.35. Tailwater deficit parameter, D, if found to be varying from 0.66 to 0.90.

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Section: Introductionmentioning

confidence: 99%

Energy dissipation in hydraulic jumps using triple screen layers

Singh

Roy

2022

Appl Water Sci

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Temporal Changes of Downstream Land of a Culvert: The Effect of an Installation of Energy Dissipator

Sadeghpour,

Vaghefi,

Meraji

2024

Iran J Sci Technol Trans Civ Eng

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Investigating scouring phenomenon in complementary channels with screen plates

Daneshfaraz,

Nezafat,

Abbaszadeh

et al. 2024

Preprint

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Recognizing the significance of scouring and implementing effective measures to mitigate and control its impact is paramount. This research delves into the examination of scouring downstream of hydraulic structures, employing screen plates as a pivotal component. To serve as energy absorbers, screen plates with varying aperture ratios of 40% and 50% have been strategically positioned at a distance of 1.5 m from the sluice gate. The primary focus is on evaluating the impact of screens on the maximum depth and length of the scour hole. Subsequently, a moving bed comprising particles of three distinct sizes (1.8, 2.6, and 5.2 mm) was selected. The outcomes of the study reveal that key parameters, including the thickness and opening ratio of the screens and their placement distance from the gate, significantly influence scouring. Notably, the maximum and minimum depths and lengths of the scour holes were observed in screens with opening ratios of 40% and 50%, respectively. Consequently, an increase in the opening ratio and thickness of the screens correlates with a reduction in the dimensions of scour holes, suggesting potential strategies for enhancing bridge resilience against scouring effects.

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Energy dissipation for supercritical flows by using screens with triangular shape openings

Cited by 3 publications

References 12 publications

Energy dissipation in hydraulic jumps using triple screen layers

Energy dissipation in hydraulic jumps using triple screen layers

Temporal Changes of Downstream Land of a Culvert: The Effect of an Installation of Energy Dissipator

Investigating scouring phenomenon in complementary channels with screen plates

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