Author(s): Jaafar S. Maatooq; Enass R. Taleb

Linked Author(s):

Keywords: Hydraulic jump; Froude number; Baffles block; Blockage ratio; Sequent depth

Abstract: The forced hydraulic jump characteristics were studied experimentally using different configurations of a standard USBR baffle blocks. Each configuration was tested under Froude numbers ranged between 2.27 to 9.2 at which the hydraulic jump located within a description of oscillating and steady jump. Two groups of baffle block models were adopted. The first group installed at one row with two blockage ratios, whereas the second group consisted of two rows; the first was fixed at a specified location after sluice gate, while the second has been installed at three different distance ratio. During each test, the sequent depth and the transverse velocity distribution were measured. The results showed that the sequent depths for all configurations were less than the sequent depth of a classical jump. Among all configurations undertaken, the greater reduction of sequent depth was 30%. The new experimental formula was developed for determining the sequent depth ratio in term of the initial Froude number for this configuration which gives the better performance. The comparisons were also made with the previous relevant studies to show the reliability of the configurations undertaken. The analysis of the experimental results concluded that; when using two rows configuration of standard USBR baffle blocks with a blockage ratio 50% and 37.5%, respectively, and at a specified distances the best performance could be achieved by reducing the sequent depth beside the velocity become nearly uniformly distributed across the width of the basin.

DOI: https://doi.org/10.15142/T3T35Q

Year: 2018