Effective fastening of the bottom of the stilling basin of a high-head dam by prestressed anchors

1994 ◽  
Vol 28 (4) ◽  
pp. 243-252
Author(s):  
V. N. Zhivoderov ◽  
N. I. Tupikov
Keyword(s):  
Stilling Basin ◽  
High Head

Hydraulic design for the two-stage stilling basin

1981 ◽  
Vol 8 (2) ◽  
pp. 137-145
Author(s):  
C. D. Smith ◽  
M. J. Klassen
Keyword(s):  
Three Dimensional ◽  
Design Criterion ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Two Stage ◽  
Stilling Basin ◽  
Hydraulic Design ◽  
In Series ◽  
Basin Floor ◽  
High Head

The two-stage stilling basin is a design sometimes used for high head energy dissipating structures. The distinguishing feature of the design is that essentially two hydraulic jumps occur in series in the same structure. The tailwater depth for the first jump is created by a fixed weir. Tailwater for the second jump is due to the natural tailwater available in the downstream channel. Since most of the energy of flow is dissipated in the first jump, the required tailwater depth to produce a jump in the second basin is considerably decreased, with the result that the entire stilling basin floor may be placed at a higher elevation than for a single basin. This can be advantageous in certain situations.In this paper the results of hydraulic model tests for a two-stage stilling basin are reported. The characteristics of the basin first were studied two-dimensionally using a parallel sided flume. A design criterion was established and this was subsequently verified on a three-dimensional model.

scholarly journals Hydraulic Model Investigation on Stepped Spillway's Plain and Slotted Roller Bucket

2019 ◽  
Vol 9 (4) ◽  
pp. 4419-4422
Author(s):  
A. S. Kote ◽  
P. B. Nangare
Keyword(s):  
Energy Dissipation ◽  
Kinetic Energy ◽  
Hydraulic Model ◽  
Physical Models ◽  
Stepped Spillway ◽  
Stilling Basin ◽  
Discharge Water ◽  
Energy Dissipater ◽  
Low Head ◽  
High Head

In ogee spillway, the released flood water from crest to toe possesses a high amount of kinetic energy causing scour and erosion on the spillway structure. The dam projects normally have a stilling basin as an energy dissipater which has specific energy dissipation limitations. The stepped spillway is a better option to minimize kinetic energy along the chute and safely discharge water in the river domain. The Khadakwasla dam is situated in Pune, Maharashtra (India), and has scouring and erosion issues on the chute of ogee spillway and on the stilling basin. The present study develops a physical hydraulic model for the dam spillway with steps, plain and slotted roller bucket as per IS Code 6934 (1998) and IS Code 7365 (2010). Experiments were performed at heads of 4m (low head) and 6m (high head) on the developed physical models, namely on the plain and slotted roller bucket model for the ogee spillway and the plain and slotted roller bucket model for the stepped spillway. It was found that the plain roller bucket of ogee spillway dissipates 81.26% of energy at the low head, whereas the stepped spillway with slotted roller bucket dissipates the 83.86% of the energy at the high head.

ESTIMATION OF HYDRAULIC JUMP CHARACTERISTICS IN STILLING BASIN WITH GUIDE WALLS

2012 ◽  
Vol 40 (6) ◽  
pp. 1599-1609
Author(s):  
Habib A.A. ◽  
Abdel-Azim M. Ali ◽  
Abd-Allh Y.M ◽  
Saleh y.k.
Keyword(s):  
Hydraulic Jump ◽  
Stilling Basin

Elimination of upper bracket resonance in extremely high head Francis hydro-generators

2009 ◽  
Vol 16 (1) ◽  
pp. 119-127 ◽  
Author(s):  
Yongyao Luo ◽  
Zhengwei Wang ◽  
Guodong Chen ◽  
Zujian Lin
Keyword(s):  
High Head

Optimum air-demand ratio for maximum aeration efficiency in high-head gated circular conduits

2014 ◽  
Vol 70 (5) ◽  
pp. 871-877 ◽  
Author(s):  
Fahri Ozkan ◽  
M. Cihat Tuna ◽  
Ahmet Baylar ◽  
Mualla Ozturk
Keyword(s):  
Froude Number ◽  
High Speed ◽  
Water Mixture ◽  
High Speed Flow ◽  
Mixture Flow ◽  
Speed Flow ◽  
Aeration Efficiency ◽  
High Head ◽  
Closed Conduit ◽  
Air Vent

Oxygen is an important component of water quality and its ability to sustain life. Water aeration is the process of introducing air into a body of water to increase its oxygen saturation. Water aeration can be accomplished in a variety of ways, for instance, closed-conduit aeration. High-speed flow in a closed conduit involves air-water mixture flow. The air flow results from the subatmospheric pressure downstream of the gate. The air entrained by the high-speed flow is supplied by the air vent. The air entrained into the flow in the form of a large number of bubbles accelerates oxygen transfer and hence also increases aeration efficiency. In the present work, the optimum air-demand ratio for maximum aeration efficiency in high-head gated circular conduits was studied experimentally. Results showed that aeration efficiency increased with the air-demand ratio to a certain point and then aeration efficiency did not change with a further increase of the air-demand ratio. Thus, there was an optimum value for the air-demand ratio, depending on the Froude number, which provides maximum aeration efficiency. Furthermore, a design formula for aeration efficiency was presented relating aeration efficiency to the air-demand ratio and Froude number.

scholarly journals On the Improvement in the Suction Performance of High-Head Axial-Flow Pumps

1968 ◽  
Vol 11 (48) ◽  
pp. 1056-1067
Author(s):  
Taijiro KASAI ◽  
Sigenori MATSUNAGA ◽  
Yukio KUNIKIYO ◽  
Haruo ISIBASI
Keyword(s):  
Axial Flow ◽  
High Head ◽  
Suction Performance

Research on the Key Technology of Exploiting and Waterflooding in One Well with ESP

2013 ◽  
Vol 655-657 ◽  
pp. 113-116
Author(s):  
Dai Liang Luo ◽  
Yong Fa Qiu ◽  
Wei Bing Xie ◽  
Guo Qiang Dong
Keyword(s):  
Lower Layer ◽  
Structure Design ◽  
Pipe Network ◽  
Pipeline Transportation ◽  
Key Technology ◽  
Transportation Distance ◽  
High Head ◽  
Downhole Monitoring ◽  
Oilfield Development ◽  
Fringe Area

The waterflooding development of Oilfield fringe area and scattered blocks are restricted by the existing pipe network design and pipeline transportation distance and so on. In order to improve the development effect of these blocks, by using advantages of ESP including high head, range capacity and mature technology, technology of exploiting and waterflooding in one well with ESP was discussed. Then, some key problems were settled such as sand prevention, sealing, downhole monitoring of process parameters, structure design and so on, and three process schemes were summarized including exploiting the upper layer and waterflooding the lower layer, exploiting the lower layer and waterflooding the upper layer and downhole pressurized injection. The technology proposed by this article has achieved good results proved by field applications. The success of the technology provides an economical and reliable energy supply technology for oilfield development, and has a broad market prospect.

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