Author(s): Angad Kumar Sharma; Zulfequar Ahmad; Pramod Kumar Sharma

Linked Author(s):

Keywords: cohesionless sediment; scour profile; dynamic scour depth; static scour depth; maximum scour depth; submerged inclined jet

Abstract: The scour of beds of gravel and sand is significant in hydraulic engineering. The behavior prediction of the pattern of scour volume, scour profile, and scour depths under submerged conditions are important aspects that depend on the nozzle diameter, jet height, jet velocity, angle of inclination, and sediment size. Various studies have been conducted with vertical jets, while there are limited experiments with inclined jets. The present study is trying to find out the response of stratified sand and gravel-bed with submerged inclined jets. A jet nozzle is used for three jet velocities at five different angles from horizontal 36°, 45°, 55°, 65°, and 75°. For each velocity and angle combination, scoring volume, pattern, and profile are noted. The finding of results shows that the volume of scour increases with increasing velocity at the same angle. Increasing the angle, the first volume of scour decreases, and then the scouring volume again increases with changing pattern from circular to elliptical. The results show for the angle of inclination between 55° to 65°, there is minimum scouring.

DOI: https://doi.org/10.3929/ethz-b-000675921

Year: 2024