Numerical Modeling of Flow Field in Morning Glory Spillways and Determining Rating Curve at Different Flow Rates
نویسندگان
چکیده
منابع مشابه
Effect of Deflector and Aeration On the Discharge Coefficient of Submerged Flow of Morning Glory Spillways
Spillways are responsible for draining floods in dams. However, morning glory spillways are considered as free spillway type. In floods, a submerged flow is formed in their crest. This factor leads to severe pressure fluctuations in the shaft, suction and vibration of the structure and also reduces the spillway efficiency. Insufficient knowledge of the hydraulics of the submerged flow will be a...
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Morning glory spillway is one of the spillways that used to passing of flood from high to low level. This spillway is used in the reservoir dams that are placed in narrow valleys and in many locations with high slope in reservoir walls. In the Morning glory spillways, the vortex flow can reduce discharge, discharge coefficient and the performance of spillway. The zigzag spillway, as another typ...
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In recent decades, many dams have been built or are under construction. Due to the high demand for water and soil erosion, increasing the need for dam construction in different regions are quite tangible. In 1900 the number of large dams, did not exceed 50. But in the 1950s to 1986 the number of large dams (over 15 meters), more than 39,000 were counted. The 70s dams has been increasing develop...
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Morning Glory Spillways are an important type of flood evacuation systems. According to the specific hydraulic and structural conditions, the evaluation of the seismic behavior of these kinds of spillways could be more precise with considering the interaction of the solid-water-foundation system. In this research, a three dimensional modeling of the morning glory spillway was conducted, conside...
متن کاملEvaluation of Error Due to Applying Average Rating Curve as downstream Boundary Condition in Unsteady Flow Modeling
The rating curve is the relationship between the water stage and the associated discharge in a givensection of a channel. In steady flow, this relationship usually has exponential type, whereas inunsteady it flow has a looped shape. Since direct developing of actual looped rating curve by usinghydrometric methods is merely possible, steady-state rating curve is commonly used as a downstreamboun...
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ژورنال
عنوان ژورنال: Civil Engineering Journal
سال: 2016
ISSN: 2476-3055
DOI: 10.28991/cej-2016-00000048