[This article belongs to Volume - 54, Issue - 05]
Gongcheng Kexue Yu Jishu/Advanced Engineering Science
Journal ID : AES-20-06-2022-228

Title : Studying The Effect of Different Sill Positions on Hydraulic Jump Length in Trapezoidal Open Channel (Experimental Work)
Ahmed Ragab Abd El salam Elsayed, Anas Mohamed Elmolla, Walid Elsayed Abd Elgalil, Mamdouh Ahmed Dardeer,

Abstract : Hydraulic Jump (HJ) is an important natural phenomenon in rivers, channels and spillways. The length of aprons and the energy between upstream and downstream must be considered. This research proposed a new model to study the parameters of the hydraulic Jump in a new channel shape like a trapezoidal Channel with side slop 1:1. It also studies more than one shape of sills to control the hydraulic Jump, which can lead to energy dissipation. The experiments were conducted over a range of Froude numbers 2.5 to 7.2. Widely runs were conducted, and measurements were undertaken and presented. The results were discussed for three shapes of the sill (straight, triangular, and trapezoidal). The results further revealed that the trapezoidal shape decreased the length of a hydraulic jump to 67% to the same Jump with no sill at the best position of 30 % of Ls/Lf. However, the trapezoidal sill is more efficient with 13% than the triangular sill and 17% than the straight sill at the same position.