Author Information

Jaafar MaatooqFollow
Enass Taleb

Start Date

2018 12:00 PM

Creative Commons License

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.

Abstract

The forced hydraulic jump characteristics were studied experimentally with using different configurations of a standard USBR baffle blocks. Each configuration was tested under Froude number 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 two rows the first was fixed at a specified location after sluice gate, while the second has been installed at three different distance ratio, X̅/b=1, 2 and 3. During each test, the sequent depth and the transvers 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% have been recorded with using configuration-B1. Accordingly the new experimental formula was developed for determining the sequent depth ratio in term of the initial Froude number for this configuration. Comparing the results generated through the use of B1-group with those presented in previous studies emphasize the reliability of configuration-B1. Thereby, the analysis of the experimental results concluded that; when using two rows configuration of standard USBR baffle blocks, the first fixed at X0/y2*= 1.3 from the sluice gate whereas the second row fixed at X̅/b=1 from the first with a blockage ratio 50% and 37.5 % respectively could achieve the best performance in reducing the sequent depth beside the velocity become nearly uniformly distributed across the width of the basin.

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May 16th, 12:00 PM

The Effects of Baffle Blocks Locations and Blockage Ratio on the Sequent Depth and Velocity Distribution of Forced Hydraulic Jump

The forced hydraulic jump characteristics were studied experimentally with using different configurations of a standard USBR baffle blocks. Each configuration was tested under Froude number 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 two rows the first was fixed at a specified location after sluice gate, while the second has been installed at three different distance ratio, X̅/b=1, 2 and 3. During each test, the sequent depth and the transvers 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% have been recorded with using configuration-B1. Accordingly the new experimental formula was developed for determining the sequent depth ratio in term of the initial Froude number for this configuration. Comparing the results generated through the use of B1-group with those presented in previous studies emphasize the reliability of configuration-B1. Thereby, the analysis of the experimental results concluded that; when using two rows configuration of standard USBR baffle blocks, the first fixed at X0/y2*= 1.3 from the sluice gate whereas the second row fixed at X̅/b=1 from the first with a blockage ratio 50% and 37.5 % respectively could achieve the best performance in reducing the sequent depth beside the velocity become nearly uniformly distributed across the width of the basin.