EFFECTS OF REYNOLDS NUMBER ON VELOCITY AND TURBULENCE CHARACTERISTICS IN CLASSICAL HYDRAULIC JUMPS BELOW A GATE

Abstract

 For a wide range of Reynolds numbers, the velocity and turbulence intensity distributions in classical hydraulic jumps have been systematically investigated under a given inflow Froude number with an undeveloped inflow condition below a gate. Effects of the Reynolds number on the magnitude and distribution of the velocity and those of the turbulence intensity in the jumps are clarified. The energy balance in the jump zone are obtained, demonstrating that the energy dissipation in the jump is not accomplished at the end of the surface roller of the jump. Based on the energy dissipation in the jump, it is shown the jump length which can be useful for the determination of the apron length.