3rd International Engineering Conference on Developments in Civil & Computer Engineering (IEC2017)
Title: Evaluation the hydraulic performance of W shape Baffles in stilling basins
Authors: Hamid H. Hussein
DOI: 10.23918/iec2017.01
Abstract: The utility of baffles built downstream in stilling basins is to dissipate the kinetic energy, adjust the location of hydraulic jump and prevent local scour downstream the stilling basin. Most investigations concentrated on the shape of baffle blocks. In this study, the hydraulic performance of a new shape (as W shape) baffle was tested. Three W baffle models were made of fiber glass, with different angles (45○, 60○ and 75○). The range of the discharges in a glass channel are from 76 to 279 cm3/s/cm. These discharges were used and controlled in such a way that the Froude number for all the tests upstream the models ranged from 4.5 to about 10.5. Generally, the results showed that all models contribute an increase of E%, but the baffle with an angle of 60o and Lb = 10 cm gave a height value of E% close to 85%. Also, at this angle, Lb gave the minimum relative length of jump. According to the results of this study, it can be considered that the W shape baffle is more efficient than other shapes since it provide a high dissipation of energy and lowering dimensions of the stilling basin. So, due to high dissipation of hydraulic energy and lower length of hydraulic jump in W shape baffles, it is recommended to be used in prototype future design of stilling basins.
Keywords: Hydraulic structures, hydraulic performance, Stilling basins, Baffles, Hydraulic jump.
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