Depth Review of the Effects of Anti-Vortex Blades on Shaft Spillway Hydraulics: A Comprehensive Examination
Subject Areas : hydraulic structures
1 - عضو هیات علمی دانشگاه آزاد اسلامی واحد سپیدان فارس
Keywords: shaft spillway, vortex formation, anti-vortex blades, flow patterns, discharge capacity, cavitation, hydraulics,
Abstract :
One commonly used type of spillway is the shaft spillway, known for its efficient design and high capacity for discharging water, although its performance can be hindered by the formation of vortices. Vortices pose significant challenges as they diminish the spillway's discharge capacity, introduce air into the flow, and can lead to cavitation-induced damage. To address these issues, anti-vortex blades have been developed as a technological solution. These specialized structures are strategically positioned to disrupt vortex formation, thereby encouraging stable flow patterns and enhancing the overall performance of the spillway system. This comprehensive review critically evaluates the effectiveness of anti-vortex blades, examining in detail their underlying mechanisms of operation, the various design considerations that come into play, and the key factors that influence their efficacy in real-world applications. Furthermore, the review delves into the intricate hydraulics of shaft spillways, elucidating fundamental concepts such as different flow regimes, the occurrence of boundary layer separation, and the mechanisms governing vortex formation within the spillway structure. By exploring how anti-vortex blade’s function, the review sheds light on their ability to introduce shear stress, dissipate energy within the flow, and facilitate the transfer of momentum to disrupt the core of the vortex. Optimal blade design and placement play a critical role in determining the effectiveness of a system. The comprehensive review delves into the various geometries of blades, including L-shaped,
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