بررسی تأثیر غلظت بار رسوبی معلق بر مشخصات جهش هیدرولیکی مستغرق

Abstract

Abstract In this study, the effect of suspended load transport on the characteristics of submerged hydraulic jump (SHJ) in a rectangular channel was investigated experimentally. Sediment concentration and jet Froude numbers in the range of 0.424%-16.15% and 1.93-4.96, respectively, were considered. Tow grain size 0.15 and 0.03 mm were used in the experiments. Characteristics of submerged hydraulic jump including velocity and concentration distribution, length of jump, the submergence depth on the gate and the energy dissipation were studied. The results showed that the submergence depth on the gate and the energy dissipation are constant by increasing of sediment concentration. The length of the jump at the presence of suspended sediment is smaller than those due to clear water flow. Also, suspended sediment by decreasing of flow resistance is made to decrease flow velocity. Keywords: Submerged hydraulic jump, Sediment concentration, Length of jump, Velocity distribution