The hydraulics of parallel sluice gates under low flow delivery condition

Bijankhan, M.; Kouchakzadeh, S.

doi:10.1016/j.flowmeasinst.2014.10.017

Cited by 11 publications

(3 citation statements)

References 19 publications

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“…This instance effectively illustrates the prevalence of varied flow conditions, their relevance to realistic applications, and the need for additional study to gain the knowledge necessary to manage them [17][18]. Bijankhan & Kouchakzadeh [19] studied the flow through parallel sluice gates under low flow delivery conditions. They experimentally indicated that the stage-discharge curve is affected when some gates are closed.…”

Section: Introductionmentioning

confidence: 99%

Experimental Establishing of Moving Hydraulic Jump in a Trapezoidal Channel

et al. 2023

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This research was prepared as a preliminary laboratory study to achieve a moving hydraulic jump with controlled discharges. It is an initial part of the study that is being prepared to treat the salt tide occurring in the Shatt al-Arab due to the lack of water imports that were coming from the Karun and Karkheh rivers from Iranian territory, as this scarcity caused a salt tide that affected significantly the environmental reality of the city of Basra and the agricultural lands surrounding the Shatt al-Arab, such as the Shatt al-Arab district and the Siba orchards. As part of the proposed solutions, a moving hydraulic jump is created that pushes the salt tongue into the Persian Gulf; the results were promising. A moving hydraulic leap is a good example of unstable super- and sub-critical flow regimes and is regarded as a specific case of unsteady flow in a channel. There aren't many published experiments on this particular flow type, and the quantitative simulation of such a flow state has some inherent complexity. An experimental setup was created for this work in order to assess the hydraulic performance of a moving hydraulic jump in a trapezoidal flume. A sluice gate was installed at the flume's upstream edge to provide an unstable supercritical flow regime, movable hydraulic jumps along the channel, and temporal water stages at the gate's upstream side for the various downstream end boundary situations. Several flow factors, including energy head, pressure head, and flow depth, were estimated from the recorded data. The study found connections between discharge and shifting hydraulic jump variables. By employing relatively stable momentum and energy formulas, simple and time-independent formulas were developed that accurately predicted the pressure head in the subcritical region of an unstable mixed flow. As a result, the moving hydraulic jump factor can be correctly predicted using time-independent correlations by using the discharge variation as a boundary scenario. Doi: 10.28991/CEJ-2023-09-04-08 Full Text: PDF

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Section: Introductionmentioning

confidence: 99%

Experimental Establishing of Moving Hydraulic Jump in a Trapezoidal Channel

et al. 2023

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“…h 1G = h 1S = h 1 . Bijankhan and Kouchakzadeh (2015b) studied the flow through parallel sluice gates under low flow delivery conditions. They indicated experimentally that the stage-discharge curve is affected when some of the gates are closed.…”

Section: Introductionmentioning

confidence: 99%

Parallel sluice gates: pier impact on flow field condition

Kouchakzadeh

Khaki-Bakhtiarvand

Bijankhan

et al. 2021

LHB

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Parallel sluice gates are used instead of a single large one in wide channels separated usually by piers in between. However, the influence of such separating piers on the downstream flow hydraulics has not been investigated thoroughly yet. The present study aimed at experimentally evaluating the effect of installing such piers on the flow condition downstream parallel gates. Different pier lengths were installed between the gates in a wide channel and the resulting flow field and velocity distributions were recorded using acoustic Doppler velocimetry, ADV. Flow pattern observations revealed different regions of forward flow, stagnation zones, and reverse flow zones. The results indicated that the presence of a pier would shift the turbulence caused by dissimilar gate openings, to the downstream pool of the parallel sluice gates. Based on the analysis of the compiled data it is recommended to consider the minimum separating pier length to achieve a more uniform flow condition in a shorter distance at the downstream pool. Vannes parallèles : impact du pilier central sur l'écoulement aval RESUME CONTACT Mohammad Bijankhan

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“…It seems that this effect has only been addressed in the experimental study by Bremen and Hager (1993) who focused on free hydraulic jumps and did not consider submerged jumps. Other previous experimental studies that examined submerged jumps between piers did not consider oscillatory SSHJ (Bijankhan and Kouchakzadeh, 2015;Smith, 1989).…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional numerical study of submerged spatial hydraulic jumps

Foda

Imam

Bazaraa

et al. 2020

Journal of Hydrology and Hydromechanics

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A three-dimensional numerical model was applied to simulate submerged spatial hydraulic jumps (SSHJ) downstream of a symmetric vent that discharges into a wider channel. Simulations were carried out for different aspect ratios of the vent, expansion ratios of vent width to downstream channel width, tailwater depth, and inlet Froude number. Depending on these factors, simulations indicated the formation of steady asymmetric SSHJ, oscillatory asymmetric SSHJ, and steady symmetric SSHJ, consistent with results of previous experimental studies. The model reproduced observed depth downstream of vent, jump length, and velocity profiles along channel centerline for steady symmetric SSHJ. For oscillatory asymmetric SSHJ, simulated oscillation frequencies had Strouhal numbers that varied with expansion ratio and ranged between 0.003 and 0.015. With piers downstream of the vent, oscillatory SSHJ continued to exhibit jet deflections when pier length was relatively short ( ≲ 0.2 of jump length) but became steady asymmetric for longer piers.

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The hydraulics of parallel sluice gates under low flow delivery condition

Cited by 11 publications

References 19 publications

Experimental Establishing of Moving Hydraulic Jump in a Trapezoidal Channel

Experimental Establishing of Moving Hydraulic Jump in a Trapezoidal Channel

Parallel sluice gates: pier impact on flow field condition

Three-dimensional numerical study of submerged spatial hydraulic jumps

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