Hydrodynamic complex is designed to study various fluid flow. It consists of several apparatuses:
Apparatus for investigations of self-excited oscillations of conical liquid jets, interacting with free surface.
Self-excited oscillations of a conical jet.
Apparatus for examination of special aerodynamic nozzle. The nozzle forms uniform fine cloud of bubbles, and creates fine and homogeneous mixtures of gas and liquids, so that almost 100% of the gas stays suspended in the liquid. It can be useful in industry (furnace injectors, internal-combustion engines, injectors of multiphase chemical reactors, aerators for fish hatcheries, water flotation and extractor systems) and health protection (dust extraction of the air, air humidification, and others).
The principle of the apparatus is patented (A.N. Khomiakov, V.S. Bondareko).
The nozzle works as a pulverizer of gas jet (aerator) in liquid, and as liquid jet pulverizer in air (injector).
Apparatus for studying bathtub vortices formed over the fluid outflow from a vessel. The vessel can be rotated.
Scheme of the apparatus. Transparent tank (1), transparent disc (2), central hole (3), hole for visualization (4), fluid supply unit (5), electromotor (6), additional drain hole (7), movable disc (8), side holes (9).
Outflow of rotated fluid from the tank through the central and side holes with formation of bathtub vortices (time t=3, 58, 150 s).
Apparatus for investigation of self-excited oscillations of plane submerged fountains. Possible oscillation regimes and its bifurcations were classified. The relation between oscillation frequency and flow parameters was obtained.
Self-excited oscillations of plane submerged fountain.
Apparatus for formation of membrane fountains. Investigations directed by V.P. Karlikov detected the cause of ruptures of free membranes. The realized conditions provide low perturbation level of the membrane surface of fountains. Fountain radius reaches the values of several meters, whereas the membrane thickness is several microns.
Membrane fountain.
Apparatus for study of colliding jets. Jets velocities are equal, while the diameters differ. The conical jet is formed after the collision, its shape and thickness depends on the parameters of colliding jets.
Collision of coaxial jets of different diameters. Right picture shows enlarged region of the collision.
