Department of Physical Hydrodynamics

Laboratory of Multiphase Medium and Cumulation

Laboratory of Vortex Flows

Laboratory of High-Energy Processes

Laboratory of Multiphase Medium and Cumulation

-Experimental and theoretical investigations of dynamics of complex rheological multiphase mediums:

-Investigation of wave dynamics in bubble mediums;

- Study of fragmentation’s mechanisms of liquid, liquid like and multiphase mediums (suspensions, emulsion, pastes, gels, polymers, abyssal system and so on).

Staff: Professors – 4, Doctors – 3

Simulation of explosive eruption of volcano

Method of hydrodynamic shock tubes (two possible location of diaphragms)

Electro-magnetic hydrodynamic Shock Tube

Cavitation zone near free surface as result of shock wave reflection from free surface. System of shock waves generated by cavitation bubbles, cumulative jet formation. Laser flash, time of exposure is 3 nsec.

Free surface

Dynamic method of micro-inhomogeneities study

Shock wave (SW) is generated by pulse magnetic field. SW parameters: +3s, Pfr 15 MPa

Cavitation zone development in a liquid drop (D=1 cm)

70 s

Liquid drop fracture at shock wave loading

60 s

t=0

t50 s

Liquid drop fragmentation under short shock loading

Later stage of cavitative fracture

t=0 t1,5 msec

ba

Structure dynamics of GRA-drop at quasi-static decompression (cold support)

t= 3 30 50

60 70 90 sec

HIGH-ENERGY DENSITY PHYSICS LABORATORY

Head of Laboratory – Dr. Prof. Gennady A. Shvetsov

Staff: 18 2 professors

6 senior researchers (Ph. D.)

BASIC ACTIVITIES

Conversion of explosion energy to electromagnetic energy Electromagnetic acceleration of solids Development of new composite low-erosion materials Shaped-charges

ELECTROMAGNETIC RAIL LAUNCHERS OF SOLIDS

Plasma Armature Rail-gun: 1 is an energy source, 2 are electrodes, 3 is the accelerated dielectric body, 4 is a foil, 5 are insulators, 6 is a shell, 7 and 8 are switches.

ELECTROMAGNETIC RAIL LAUNCHERS OF SOLIDS

m = 1,3 g Vmax = 7,4 km/sec

1-4: plasma armature velocity

5: projectile velocity

6: theoretical velocity

Why ??

Erosion of materials!• new materials for pulsed power and industrial applications

• explosive welding

• explosive compaction of powders

Diagram of experiments: 1 shaped charge; 2 source of electromagnetic energy; 3 electrodes; 4 inductive probes for measuring the current and the derivative of the discharge current; 5 sites of X-ray photography.

DISRUPTION OF SHAPED-CHARGE JETS BY A PULSED CURRENT

X-ray photographs of shaped-charge jets without a current (on the left) and with a current (on the right) recorded at various times.

DISRUPTION OF SHAPED-CHARGE JETS BY A PULSED CURRENT