RESEARCH DEPARTMENT OF HYDROBIONICS AND BOUNDARY LAYER CONTROL

The department was established in 1965. Its first director (in the years 1965-1988) was the winner of the State Prize of the USSR Professor L. F. Kozlov (1927-1988), an outstanding scientist in the field of ship hydrodynamics and theory of the boundary layer. The results concerning the solution of many problems in this area published in his works have been recognized both in our country and abroad. Under his guidance, the Department has created a scientific school for the next generation of researchers who continue the determining of a professional image of the Institute of Hydromechanics of NASU in the field of near-wall flows.

In 1988- 2000, the Department was headed by Dr. Sci. Professor V. Babenko. Since 2000,  a Corresponding Member of NASU, Doctor of Physical and Mathematical Sciences, Professor G. A. Voropaev is the Head of this Department.

Currently, the department employs 13 people, including one doctor and seven candidates. In recent years, the team prepared and defended four Candidate Theses.

MAIN RESEARCH TOPICS:

• fundamental and applied aspects of the near-wall flows;
• hydrobionics as a study of the kinematics and energy of motion, adaptive properties of high-speed fishes and aquatic animals needed for development of the concept of minimum drag bodies at different speeds.

Over the past 10 years, the traditional subjects of the works conducted in the Department has undergone some changes. The focus of research is made on studying of fine structure of the vortex and wave perturbations in the near-wall shear flows, processes of generation, development and interaction of vortex disturbances in shear flows, their spatial and temporal scales determining the integral drag characteristics of the body. However, nowadays the department expands the range of tasks in the area of transonic and supersonic dynamics, as well as in the field of applied hydroengineering. A series of studies of pulsed high-speed ejector has been conducted. The profiles of channels providing the high rates of ejection by pulsed flow of gas are obtained. A new technique and equipment for its implementation is created for determining of parameters of wave fields in restricted waters and real-time data processing. The obtained results are currently used in contractual developments. Traditionally, all scientific objectives of the near-wall flow of various media are formulated and solved in a complex, combining the analytical, numerical and experimental methods of solution.

Recently, the main efforts of employees of the department are aimed at the study of the fine structure of the vortex near-wall flow on structured surfaces. The structured surface is meant to be one  of a regular streamlined relief with geometrical parameters subjected to certain limitations, depending on the shape of streamlined bodies and the task put forward: reduction of the body drag or increase of heat mass transfer on the surface.

The Department has an appropriate experimental facilities: hydrodynamic tunnel with a working size of 400 * 400 * 2000mm with a working range of flow velocities from 0.3 to 3.0 m/s. It is equipped with a strain gauge measurement of forces and moments, hot-wire instruments for measuring of velocity fields and tools for field measurements of pressure and pressure fluctuations in the flow. Also, the system for real-time receiving and analysis of experimental data, system and method for visualization of the near-wall flow are available.

A presentation dedicated to the 50-th aniversary of the Department of HB and BLC