The influence of a combined aerator on aeration characteristics

Aerators with sharp lateral enlargements and bottom drops generally cause adverse effects in spillway tunnels a mild base slope, including serious cavity back flow water wings striking the tunnel roof. Taking RM Hydropower Station’s as its example, this paper proposes new type of combined aerator characterized by “variable slope” longitudinally transverse “sharp enlargement plus straight section.” This not only increases stability, resulting more effective aeration, but also inhibits development wings, contributing to an improved pattern flow. In addition, systematically explores influence flip bucket (drop), gently sloping section, steeply section upon aerated summarizes rules according which diffusion angle formation wings. offers technical solutions, theoretical support, for design aerators slope.