Author(s): Jiayue Hu; Hubert Chanson; Matthew Mason

Linked Author(s): Jiayue Hu

Keywords: Hydraulic jump; Wind tunnel; Wall jet flow; Hunter Rouse; Physical modelling

Abstract: The hydraulic jump has been studied for several centuries but due to limited instrumentation and highly turbulent flow conditions, detailed velocity and pressure measurements are difficult in water flumes. In the present study, following the approach put forward by Hunter Rouse, a hydraulic jump model was built in a wind tunnel in order to develop an analogy between hydrodynamics and aerodynamics. Wind tunnel measurements of turbulence and dissipation, flow visualisations with wool strings and smoke generators revealed distinct flow regions: jet flow, a recirculation zone, and a shear flow zone as exist in hydraulic systems. Velocity measurements using Prandtl-Pitot tube, S-tube and Cobra probe also showed consistent turbulent flow characteristics between wind tunnel and hydraulic jump models. The results of this study highlight the analogy between hydraulic jump and a confined wall jet.

DOI: https://doi.org/10.64697/978-90-835589-7-4_41WC-P2077-cd

Year: 2025