Design of Hydraulic Jump Chambers

Abstract

The results of a model study of an energy dissipator, called a hydraulic jump chamber, are given. This structure uses precast concrete blocks secured to their inside periphery. The results showed that three sets of blocks were required for the proposed design to function. Compared with other terminal structures that use hydraulic jumps to achieve velocity reductions, hydraulic jump chamber has a simpler design, which may lead to lower costs. Hydraulic specifications and design procedures are given that minimize material and labor costs. The diameter of this design is given by equations fitted to experimental data generated by model studies. These equations are functions of the depth and Froude number of the flow entering the chamber. Most other hydraulic design variables are related to the chamber's diameter by dimensionless parameters, such as the spacing of concrete blocks, their dimensions, and their position with regard to the inlet and outlet of the chamber.