Experimental study on the shape of plunge pool in the Horizontal Swirl Spillway Tunnel

According to the study on shape of plunge pool in horizontal swirl spillway tunnel, design scheme a with better energy dissipation effect is proposed. Based hydraulic physical model test, which includes atmospheric pressure and decompression tests, combined different pool, measurement results fluctuating pressure. Main frequency sidewall are analysed. The show that inlet section connected by gradual variable length gradient segment 6m. long round gate hole. To improve side wall pressure, increasing from 6.0m 14.0m. Finally, proposed has advantages simple convenient construction, these studies provide reference support for hydropower dams western China.