International Research Journal of Engineering and Technology (IRJET)
Hydraulic jumps are frequently used for excessive kinetic energy dissipation under hydraulic structures like spillways, chutes, gates, drops etc. and the jumps are often generated with the assistant of baffle blocks and kept inside the stilling basin. In this research the effect of spaced and staggered semi circular strip corrugated beds on characteristics of hydraulic jump has been experimentally investigated. Comparison between different corrugation heights and spacing is also experimentally examined.Seventy experimental runs were carried out considering wide range of Froude numbers ranging from 2.5 to 6.2. Relative roughness ranges from 0.3 to 0.8 of corrugated shapes were studied under different flow conditions. Performance of hydraulic jump on corrugated beds by varying the roughness intensity by 50% 33% 25% and 20% respectively and by keeping the roughness intensity same i.e. 25%for getting optimum results was also experimentally investigated. The result of this study confirms that for spaced and staggered semicircular strips the sequent depths were reduced by average values 29% and 34% respectively, length of jump reduced by average values 21% and 24% respectively while creates a high energy loss of average values 34.6% and 36.6% respectively compared to a classical hydraulic jump respectively. Shear stress increases eight times than that of smooth bed by staggered corrugated bed. Staggered semi circular corrugated bed showed optimum results than spaced semi circular strip beds. Results of the present study were agreed acceptably with the previous studies.The use of corrugated beds reduce the length and depth as well as can decrease the stilling basin installation cost. The results also show the effectiveness of corrugated beds for energy dissipation downstream the hydraulic