RESEARCH DEPARTMENT OF THE FLOWS WITH FREE BOUNDARIES

     The department was established in 1968. In the years of 1968-1987 it was headed by Academician of NASU G. V. Logvinovich, and since 1988 by Corresponding Member of NASU Yu. N. Savchenko.

The priority research areas:

• hydrodynamics of jet, bubble and droplet flows;
• high-speed motion in fluids based on supercavitation;
• hydrodynamics and thermal physics of near-wall flows.

Currently, the department has 16 employees, organized into three groups interacting with each other:

• a group of theoretical studies and computer modeling;
• a group of experimental studies;
• design team.

The laboratories of the Department have the following experimental equipment:

1. Small Hydrodynamic Tunnel (HDT-1) provides a flow rate of up to 8.9 m / s. Its working area has a section 340 x340 mm and a length of 2 m

2. Large Multifunctional Hydrodynamic Tunnel (HDT-2). Its working area has a section 0.5 x 0.5 m and a length of 4 m, the maximum design flow rate is 32 m/s. Currently, the inlet part of HDT-2 with the section of 2.1 x 2.1 m and a length of 40 m, having 10 double viewing windows of hardened glass laminate (size 840 x 630 mm), is used as a starting booth.

3. Vertical and Horizontal Launcher Benchmarks. A Vertical Benchmark is abile to tilt up to 18 °, while the Horizontal High-Speed Start-Up Benchmark equipped with an electrochemical catapult provides the initial velocity of models up to 1800 m/s along with the distance of 36 meters of free movement.

Over the past 10 years, 4 Doctoral and 1 Candidate (PhD) thesis were successfully defended at the Department. Its team department was awarded with the Prize of the Academy of Technological Sciences of Ukraine (1995) for the best work in the development of new technologies, " Underwater Achieving of the Near-Sonic Speed and Development of the Systems Providing it"; the State Prize of Ukraine in Science and Technology (2002) for a series of scientific works "The Study of Hydrodynamic Supercavitation Trends".

The Department Proposals Concerning the Scientific and Technical Cooperation and Consultations in Solving of the Design and Educational Challenges in the Transport, Energy and Industrial Sectors in Ukraine

1. Design of experimental facilities  and benchmarks for studying of supercavitating flows.
2. Conducting of the tests in hydrodynamic tunnels and launch benchmarks.
3. Design of the systems for control and stabilization of underwater supercavitating objects.
4. Design of blade and hydrojet engines for propulsion and positioning of underwater objects.
5. Design of sprinkling cooling systems for thermal and nuclear power plants. Design of technical systems for jet machining of materials.
6. Technology of hydraulic borehole mining based on jet supercavitation and focusing the pulse of underwater jets.
7. Methods and softeware for calculation and computer simulation of supercavitation object dynamics.
8. Series of lectures on theoretical problems of supercavitation, fundamentals of designing of supercavitating underwater objects.