Hydraulic Performance of Howell–Bunger and Butterfly Valves Used for Bottom Outlet in Large Dams under Flood Hazards
نویسندگان
چکیده
Floods control equipment in large dams is one of the most important requirements hydraulic structures. Howell–Bunger valves and butterfly are two these types flow controls that commonly used bottom outlet dams. The optimal longitudinal distance (L) between such turbulence from valve should be dissipated before entering valve. Subsequently, passing through must have a fully developed state reaching Therefore, purpose this study was to evaluate valves. For purpose, different distances were investigated using Flow-3D numerical model. ideal obtained model physical considered tested. Based on study, parameters patterns, velocity profiles vectors, kinetic energy, formation vorticity as criteria determine appropriate distance. In addition, determined, evaluated based extracted simulation. A comparison results laboratory models showed minimum required equal four times diameter pipe (L=4D) so not adversely affect performance system.
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ژورنال
عنوان ژورنال: Applied sciences
سال: 2022
ISSN: ['2076-3417']
DOI: https://doi.org/10.3390/app122110971