Experimental and numerical investigations of flow through free double baffled gates

Helmi, Ahmed M.; Elgamal, Mohamed

doi:10.4314/wsa.v37i2.65871

Cited by 4 publications

(2 citation statements)

References 6 publications

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“…Use of finite-element analysis began with McCorquodale and Li (1971), who considered flow under a sluice gate. Many other studies have since appeared in the literature, including those reported by Bhajantri et al (2007aBhajantri et al ( , 2007b, Castro-Degado (1986), Chan et al (1973), Chanel and Doering (2008), Daneshmand and Kazemzadeh-Parsi (2004), Guayjarernpanishk andAsavanant (2009), Helmi andEl-Gamal (2011), Ikegawa and Washizu (1973), Li et al (1989), Petrila (2002), Sankaranarayanan and Rao (1996) and Vanden-Broek (1997).…”

Section: Introductionmentioning

confidence: 90%

Bottom outlet dam flow: physical and numerical modelling

Daneshmand¹,

Adamowski²,

Liaghat³

2014

Proceedings of the Institution of Civil Engineers - Water Manag

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This paper presents an analysis of flow parameters through a bottom outlet conduit with gated operation using physical and numerical models. A physical model of the regulating bottom outlet of Shahryar dam in Iran was used to investigate the hydraulic forces on the service radial gate and flow patterns within the conduit. The model was constructed from Plexiglas, and discharge and pressure data were recorded for different gate openings. The Froude law of similarity was satisfied in the hydraulic modelling, allowing for an investigation of the dynamic similarity of inertial and gravitational forces. The numerical scheme was based on using the natural-element method to study hydraulic forces and flow parameters within the conduit and the finite-element method to evaluate the natural frequencies of the radial gate. The results of the calculations for different radial gate openings showed good agreement with those from physical modelling for the pressure distributions throughout the flow domain and on the gate.

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Section: Introductionmentioning

confidence: 90%

Bottom outlet dam flow: physical and numerical modelling

Daneshmand¹,

Adamowski²,

Liaghat³

2014

Proceedings of the Institution of Civil Engineers - Water Manag

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“…However, the depth of scour hole, dune height, volume of scour, extent of scour, and dune are maximum, when flow is completely above the gate and minimum when completely below the gate. [23] Presents an experimental investigation and numerical analysis of the flow through the free double baffled gate. It was found that the gate inclination angle (α) and the gate spacing (S) are the most effective parameters in controlling the H-Q relation, where (Q is the discharge throughout the gate and H is the upstream head of the gate measured vertically from the crest (in the case of pure weir flow).…”

Section: Introductionmentioning

confidence: 99%

Effect of double gate mechanism on scour hole characteristics

Basyoni,

Mostafa,

Elnikhili

2022

The Egyptian International Journal of Engineering Sciences and

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Local scour due to free hydraulic jump downstream hydraulic structures may cause damage or complete failure of these structures, so controlling of this phenomenon is very important. The main goal of this study is to reduce the characteristics of a scour hole downstream double gates system. Using a plate in certain positions have to build downstream of the model as a typical engineering precautions to minimize the effect of erosion. The optimum precaution plate position is a key parameter in the design of this type of hydraulic structures. The proposed model of the double vertical gates distributed the passing discharge via two vents, in which the lower discharge passed under the lower gate, while the upper discharge was the passing discharge between the two vertical gates. Using the relative gate opening of 0.25 and fixing the plate at relative vertical position Z/L B of 0.00, 0.027, 0.047 and 0.067. The plate at a relative vertical position of 0.067 was the optimal position causing an increasing of the relative energy loss by 1.72% and the relative maximum scour depth decreased by 1.69% compared to the case of no plate downstream the gates. The measured results matched closely with the estimated results from the developed empirical equations.

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Numerical flow simulation in gated hydraulic structures using smoothed fixed grid finite element method

Kazemzadeh-Parsi

2014

Applied Mathematics and Computation

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Experimental and numerical investigations of flow through free double baffled gates

Cited by 4 publications

References 6 publications

Bottom outlet dam flow: physical and numerical modelling

Bottom outlet dam flow: physical and numerical modelling

Effect of double gate mechanism on scour hole characteristics

Numerical flow simulation in gated hydraulic structures using smoothed fixed grid finite element method

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