Supercritical Flow over Sills

A conformal mapping solution for irrotational gravity-free flow is modified to determine an expression for the drag on continuous and dentated sills. The effect of gravity is partially accounted for by the inclusion of the upstream hydrostatic force in the momentum equations. For the dentated sill case, continuity, energy and momentum relationships were used to divide the total flow into two portions, i.e., one passing between the baffles and another passing over the baffles. Two-dimensional techniques were then applied to determine the baffle drag coefficient. Good agreement was found between experimental and theoretical drag coefficients for both the continuous and dentated sills for (jet height)/(baffle height) 1.4.