Effect of Semi Cylindrical Bed on Hydraulic Jump Characteristics in Diverging Stilling Basins

Document Type : Original Article

Authors

1 Assistant Professors, Department Water Engineering, University of Tabriz., Tabriz., Iran

2 Professors, Department Water Engineering, University of Tabriz,

3 Msc of Water Engineering, University of Tabriz

Abstract

In this study, the characteristics of the hydraulic jump on semi cylindrical rough bed a diverging stilling basin has investigated experimentally. The experiments have done with the walls diverging angles of 0, 2, 4, 6 and 8 degree for six different Froude numbers. Total of 200 tests were performed within the range of 5 to 8 Froude numbers. The relative depth reduction of jump for the angles of 0, 2, 4, 6 and 8 degrees have obtained 10.5, 17.7, 22, 26 and 26.2 percent respectively. The average reduction of length jump for the angles of 0, 2, 4, 6 and 8 degrees with the rough bed have obtained 47.9, 57.4, 59.9 ,65.9, and 68.2 percent respectively and in the optimal case (C2.2D) the reduction of length jump is 75 percent. The divergence of a basin without roughness effect also has influenced on reducing the relative length of jump about 37 to 47 percent and the relative length of jump are directly related to the angle of a divergence basin.

Keywords

References

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Iranian Journal of Irrigation & Drainage
Volume 11, Issue 6 - Serial Number 66
March and April 2018
Pages 988-998

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