Unsteady hydrodynamic flows

• Unsteady interaction of thin conical turbulent fluid jets with free surface of a fluid was studied experimentally in tanks of various shapes. Self-excited oscillation frequency as a function of the jet height and velocity was investigated.
  
  
  Self-excited oscillations of a conical jet.
  
  
  
• Mechanism and properties of the penetration of water jet surrounded by a gas layer into a fluid at moderate jet velocities were investigated. Significant increase of the penetration depth was obtained.
• Impact interaction of continuous and pulse fluid jets surrounded by a gas layer with rigid flat surface was studied.
• Regimes of self-excited oscillations of submerged fountains were analysed.
  
  
  Self-excited oscillations of a submerged fountain.
  
  
  
• Various cavitation flows, including lattice control surfaces, were experimentally studied. As a part of students' practical training in hydrodynamics, the problem of ventilated cavitation flow around a disc is prepared.
  
  
  Ventilated cavitation in a flow around a disc. The disk is located normal to the water flow. The air is supplied behind the disc.