Selection of Energy Dissipation Scheme in Plunge Pool for Altash Project
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Abstract:
In this paper, Altash hydropower station was chosen as the research object. The best energy dissipation scheme was selected based on 1:50 hydraulic model. It could be studied by comparing the hydraulic characteristics in the flat bottom water cushion pool and scouring patterns in the cushion pool with lining slope but no bottom protection. By measuring pulsating pressure and uplift force, the possible damage range in the cushion pool could be predicted. And through the analysis of the flow pattern and scouring patterns, the shape of flip bucket of spillway tunnel could be optimized. The comparative study showed that the optimized flip bucket could change trajectory nappe forms, adjust scour pit shapes, reduce the slope erosion and it was feasible for this cushion pool to adopt the form of the lining slope but no bottom protection with the optimized flip bucket. The results can provide reference for similar projects.
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