Modified type III stilling basin - new method of design

Vittal, Nandana; Algarni, Ayed

doi:10.1080/00221689209498896

Cited by 4 publications

(1 citation statement)

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“…It was also reported that the erosion and hydraulic precision of the tail waterbed should be taken into consideration during the design process. Vittal, Al-Garni [23] presented a new method of design for the type USBR III stilling basin over a major range of discharges passing the spillway structure. The modi ed new basin is arranged in double rows of the single row of friction blocks in the USBR basin, to set up the velocity distribution of the subcritical ow after the hydraulic jump in the basin.…”

Section: Introductionmentioning

confidence: 99%

Experimental analysis of hydraulic jump at high froude numbers

2023

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The hydraulic jump is a rapid transition state from supercritical to subcritical ow that occurs commonly in rivers, prismatic channels and downstream of spillways. In this study, the characteristics of the hydraulic jump in a stilling basin downstream of the spillway chute channel with the slopes of α = 12 o and 30 o were investigated experimentally for different Froude numbers of incoming ow, Fr 1 = 7, 7.5, 8, 9, 10 and 12, and relative heights of sill in the range of 4 < h s /h 1 (S) < 13 (S relative height). In the experiments, in which velocity eld measured by laser Doppler Anemometry, it was particularly focused on the effects of both different structural con guration and ow conditions on the hydraulic jump and energy dissipation ratio. Experimental measurements showed that the length of hydraulic jump and the roller zone increases with the decrease of the sill height for α = 12 o and 30 o . In addition, the length of the hydraulic jump and roller zone increased with decreasing Froude numbers. The turbulence intensity in the jump region was determined to be greater than the turbulence intensity in the region near the bottom of stilling basin. The turbulence intensity, in general, tended to decrease with decreasing Froude number.

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Section: Introductionmentioning

confidence: 99%

Experimental analysis of hydraulic jump at high froude numbers

2023

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Hydraulic jump in a circular stilling basin by using angled baffle blocks

Dashtban,

Kabiri-Samani,

Fazeli

et al. 2024

Flow Measurement and Instrumentation

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Velocity distribution characteristics of counter-current jets

Wang

Diao

2023

Proceedings of the Institution of Civil Engineers - Water Manag

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A counter-current jet (CCJ) is significantly different from a classical jump – it is like a classical jump with a reverse surface jet layer above it. A series of experiments, with the jet's Froude number in the range 4–10, was conducted to investigate the velocity distribution characteristics of CCJs. It was found, compared with a classical jump, the CCJ velocity distribution was more even and the decay of the maximum velocity was more efficient. It was beneficial to the energy dissipation and the deceleration of a high-speed flow. The variations of velocity with depth were opposite in the upper and lower parts of the zero-velocity line, resulting in relatively large fluid internal friction near the zero-velocity line. The internal friction between the surface jet layer and the lower fluid also increased the energy dissipation rate. A counter-current energy dissipator was found to achieve a good energy dissipation effect without auxiliary energy dissipators, which could be beneficial to engineering applications.

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Modified type III stilling basin - new method of design

Cited by 4 publications

References 1 publication

Experimental analysis of hydraulic jump at high froude numbers

Experimental analysis of hydraulic jump at high froude numbers

Hydraulic jump in a circular stilling basin by using angled baffle blocks

Velocity distribution characteristics of counter-current jets

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