Results 301 to 310 of about 47,605 (348)
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Journal of the Hydraulics Division, 1963
A definition sketch is proposed for the submerged hydraulic jump with the introduction of a submergence factor. Theoretical and empirical equations have been developed for the prominent flow parameters. The energy loss in the submerged jump has been shown to be considerably less than that in the corresponding free jump for higher submergences.
N. S. Govinda Rao, N. Rajaratnam
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A definition sketch is proposed for the submerged hydraulic jump with the introduction of a submergence factor. Theoretical and empirical equations have been developed for the prominent flow parameters. The energy loss in the submerged jump has been shown to be considerably less than that in the corresponding free jump for higher submergences.
N. S. Govinda Rao, N. Rajaratnam
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Journal of the Hydraulics Division, 1978
When a supercritical flow in a channel is forced to change into a subcritical flow, the transition will normally occur as a hydraulic jump, and the energy loss in the jump will be large. With increasing supercritical depth and decreasing difference between the corresponding depths the energy loss will diminish and the transition will at last occur in ...
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When a supercritical flow in a channel is forced to change into a subcritical flow, the transition will normally occur as a hydraulic jump, and the energy loss in the jump will be large. With increasing supercritical depth and decreasing difference between the corresponding depths the energy loss will diminish and the transition will at last occur in ...
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Upstream Internal Hydraulic Jumps
Journal of Physical Oceanography, 2006Abstract In stratified tidal flow over a sill, the character of the upstream response is determined by a Froude number Fs based on the stratification near the surface. This is distinguished from the Froude number governing the response in the neighborhood of the sill crest, which is based on the weak density step associated with a flow ...
Patrick F. Cummins +2 more
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Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1964
A stream of swirling water descending a vertical Perspex tube was obstructed near its exit from the apparatus. In this way hydraulic ‘jumps’ were formed with an unbroken air core extending on both sides of the discontinuity. As in an open horizontal channel, three kinds of jump were seen: (i) purely undular, (ii) partly undular and partly turbulent ...
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A stream of swirling water descending a vertical Perspex tube was obstructed near its exit from the apparatus. In this way hydraulic ‘jumps’ were formed with an unbroken air core extending on both sides of the discontinuity. As in an open horizontal channel, three kinds of jump were seen: (i) purely undular, (ii) partly undular and partly turbulent ...
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Submerged Radial Hydraulic Jump
Journal of the Hydraulics Division, 1980A slight flaring of the side walls of the stilling basin can be advantageous in reducing the exit velocities. The hydraulic jump in such a stilling basin is referred to as a radial hydraulic jump. When the sluice gates discharge directly to the stilling basin, a submerged radial hydraulic jump will probably occur. An experimental study produced surface
John A. McCorquodale +1 more
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Journal of the Hydraulics Division, 1976
A simple theory is developed whereby an expression for the length of the classical hydraulic jump is obtained. The theory is based on the postulate that the roller region of the jump is composed of a chain of energy containing eddies. The theoretical expression is compared with existing experimental data.
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A simple theory is developed whereby an expression for the length of the classical hydraulic jump is obtained. The theory is based on the postulate that the roller region of the jump is composed of a chain of energy containing eddies. The theoretical expression is compared with existing experimental data.
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Journal of Hydraulic Engineering, 2008
Ski jumps are a standard element of dam spillways for an efficient energy dissipation if takeoff velocities are large, and stilling basins cannot be applied. This laboratory study investigates the hydraulic performance of a triangular-shaped, rather than the conventional circular-shaped, bucket placed at the takeoff of ski jumps.
Steiner, Remo +3 more
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Ski jumps are a standard element of dam spillways for an efficient energy dissipation if takeoff velocities are large, and stilling basins cannot be applied. This laboratory study investigates the hydraulic performance of a triangular-shaped, rather than the conventional circular-shaped, bucket placed at the takeoff of ski jumps.
Steiner, Remo +3 more
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Undular Hydraulic Jumps in Circular Conduits
Journal of Hydraulic Engineering, 2002Undular hydraulic jumps in circular conduits are considered with an experimental approach. Based on previous findings in rectangular channels, this research indicates differences in terms of shape effects. All present results depend on the filling ratio of the upstream conduit flow in addition to the upstream Froude number.
GARGANO, Rudy, HAGER W. H.
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1992
Given the simplicity of channel geometry and the significance in the design of stilling basins, the CHJ received considerable attention during the last sixty years. Although first described by Leonardo da Vinci in the 16th century, it was only in 1820 when the Italian Bidone published the first test results (see Macagno, 1967, who presented excerpts of
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Given the simplicity of channel geometry and the significance in the design of stilling basins, the CHJ received considerable attention during the last sixty years. Although first described by Leonardo da Vinci in the 16th century, it was only in 1820 when the Italian Bidone published the first test results (see Macagno, 1967, who presented excerpts of
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Physics of Fluids, 1997
An asymptotic order-of-magnitude description is given of the structure of a circular laminar hydraulic jump for large values of the Reynolds and Froude numbers of the flow entering the jump. The results are compared with numerical solutions of the boundary layer equations for the flow in a liquid layer on a horizontal disk and with experimental results
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An asymptotic order-of-magnitude description is given of the structure of a circular laminar hydraulic jump for large values of the Reynolds and Froude numbers of the flow entering the jump. The results are compared with numerical solutions of the boundary layer equations for the flow in a liquid layer on a horizontal disk and with experimental results
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