Investigation on non-circular hydraulic jumps formed due to obliquely impinging circular liquid jets

Abstract

Oblique impingement of a circular liquid jet with a horizontal target gives rise to hydraulic jumps of unique no-circular shapes. Hydrodynamics of this phenomenon have been experimentally investigated in the present work. Hydraulic jumps of two broad categories have been observed. At higher angles of jet inclination, the jumps are bounded by a smooth curve. However, at lower angles of inclination, typical jump profiles with corners have been observed. Effect of jet inclination angle on jump the profile and jump area has been investigated. Measurements of stagnation pressure and film thickness for different jet inclination angles and volume flow rates of liquid are reported. Film thickness measurements are made using an innovative cylindrical conductive probe, at the forward (θ = π) and backward (θ = 0) radial locations, for regions both before and after the jump. The striking difference between the non-circular and circular hydraulic jumps is also critically assessed.