doiSerbia

Influences of hydrodynamic conditions, nozzle geometry on appearance of high submerged cavitating jets

Hutli Ezddin (Faculty of Mechanical Engineering, Belgrade)
Abouali Salem (Faculty of Mechanical Engineering, Belgrade)
Hucine Ben Mohamed (Faculty of Mechanical Engineering, Belgrade)
Mansour Mohamed (Faculty of Mechanical Engineering, Belgrade)
Nedeljković Miloš S. (Faculty of Mechanical Engineering, Belgrade)
Ilić Vojislav (School of Engineering, University of Western Sydney, Western Sydney, Australia)

Based on visualization results of highly-submerged cavitating water jet obtained with digital camera, the influences of related parameters such as: injection pressure, nozzle diameter and geometry, nozzle mounting (for convergent / divergent flow), cavitation number and exit jet velocity, were investigated. In addition, the influence of visualization system position was also studied. All the parameters have been found to be of strong influence on the jet appearance and performance. Both hydro-dynamical and geometrical parameters are playing the main role in behavior and intensity of cavitation phenomenon produced by cavitating jet generator. Based on our considerable previous experience in working with cavitating jet generator, the working conditions were chosen in order to obtain measurable phenomenon.

Keywords: Nozzle, convergent, divergent, jet, cavitation cloud, shear stress, vortex ring, length, angle

Projekat Ministarstva nauke Republike Srbije, br. TR35046