Effect of sill in the hydraulic jump in a triangular channel Effet du seuil sur le ressaut hydraulique dans un canal triangulaire

Abstract

Hydraulic jumps are experimentally examined in a horizontal symmetrical triangular channel of 90◦ central angle. This study investigates the main features of both the minimum-B jump and the sill-controlled jump under various inflow conditions. The development of jumps was ensured using either a thin-crested or a broad-crested sill. Based on a large experimental program, the data were fitted to empirical relations to detect the effect of the inflow Froude number on the relative sill height, the sequent depths ratio and the non-dimensional toe position of the sill. The relations obtained are recommended for designing irrigation ditches.