Гідравліка і гідротехніка: Науково-технічний збірник. Вип. 65.- К.: НТУ, 2011. - 139 с.

Name of the article Author Annotation Page
The theoretical formula length of the hydraulic jump and the postulate of lost his power

S.G. Tkachuk

The author introduces the theory of the hydraulic jump postulate according to which the loss of energy in it due to the work of inertia forces on a vertical segment equal to its height. Postulate can theoretically determine the length of the hydraulic jump. Comparison of results with the theoretical formula and the most common empirical correlations indicates that they are practically identical, but only for certain fixed parameters of the flow, shows limited ability of the latter.

Conceptual foundations of flood risk in mountain river basins ukrainian carpathians




Conceptual framework and key areas of flood risk management plan in a single system of integrated river basin management

Prediction of common and local erosion under bridge channels based in heterogeneous media mechanics

O.S. Slavinska

The paper presents a calculating method for the general and local erosions channel flow in the zone of bridges influence, based on the mechanics of inhomogeneous medium. On the basis of general transport equation inhomogeneous flow proposed system of equations that describes the dynamics of the main body of an open stream, that bears a suspension. For the closure of this system the model of turbulence is adapted. In the proposed model equations the conditions of flow, which is incident on a bridge support, take into account.

Effect of angle shop (merger) liquid along the way for data flow in pipeline pressure perforate

A.N. Kravchuk,

O.J. Kravchuk

This article analyzes the rationale and problems of temperature influence on the work of hydraulic systems of aircraft. We consider about the hydraulic system, her design and operation principle. In the article is viding the definition of the rheological properties and the coefficient of hydraulic resistance for the hydraulic elements when the temperature conditions of operation of aircraft and machine oils changes. There is represent a method for testing the system on the performance of units depending on the choice of working fluids for different operating conditions. This allows achieve the stability and efficiency, which is very important for all transport models, especially if it relates to aviation.

Performance combined drive lift devices by temperature liquid

O.N. Jahno,

A.N. Muraschenko,

A.P. Gubarev

In this article the essence of methodological principles of quality management of higher education in a context of the fundamentalization of the professional training in higher educational institutions is considered. It is defined that the most effective are system and process principles at the present stage for construction of control systems by quality.

Continuous heat hydrostatic drive geliostations

O.P. Gubarev,

Y.O. Pyzhykov,


Considered requirements to drive the positioning receiver sun power relative to the sun. Proposed use of the effect of thermal expansion of the liquid under the effect of increasing its temperature, and creation on this basis the thermal hydraulic positioning receiver which operates on the heat flux of sunlight. Formulated requirements for coefficient of thermal expansion and modulus of elasticity of fluids. Identified basic geometrical parameters of the drive elements, as well as their characteristics, which provide the thermal hydraulic performance.

Course abnormally viscous liquid in a conical annular channels in the field of mass forces

O.N. Jahno, S.I. Odayskyy,

O.V. Kryvsheev,

V.S. Kryvosheev

In this article the attempt is undertook to evaluate the influence of centrifugal forces on the laminar instable current of abnormal and ductile liquid submitting to the Law of Ostvalde de Vile, on the hydraulic losses in conical hoop canal. The estimation of such influence may essentially affect under the lubrication quality determination of surfaces in the presence of longitudinal motion through the canal.

Practical formula and limit estimated depth of local erosion

S.G. Tkachuk

On the basis of the fundamental law of conservation of energy is derived and practical formula for determining the maximum depth of local erosion crater. It is believed that all the specific (per unit volume) energy of the flow is spent on the work of raising the funnel of a unit volume of soil. Full-scale approximating the relative depth of local erosion of the inventory M. Zhuravleva, obtained the calculated dependence with regard to its reliability. Maximum depth of local erosion crater is a reference value, as estimated depth under no circumstances be greater than it.

Polynomial approximation of the flow velocity fields in limited volumes


The results of experimental investigations of liquid flows in spacecraft tanks during its orbital motions are presented. The flow velocity profiles are approximated by power series that in combination with similarity criteria provide the adequate picture of inertial fuel flows in spacecraft tanks.

The past and the present of tuzla island




The problem of protection from destruction by sea waves of the island of Tuzla, which is artificially separated from the head of the Caucasian Tuzla Spit.

Geometric analysis of expansion and decay semibounded jet plane

V.O. Mileykovskyy

The approach to calculation of rate of expansion and decay of submerged semibounded jet is offered using the geometrical analysis of a macrostructure of a jet boundary layer without use of experimental data. The accepted assumptions will allow obtaining rate of expansion and decay of the complex jet flows on the surfaces.

Mathematical model of working in hydraulic shock absorbers



The paper presents a mathematical model of work processes in hydraulic shock absorber, which takes into account the direction of motion, the inertial component of the load, the difference in throttling under the “compression” and “lights” out. Checking the correctness and adequacy of the model shoved the possibility of its use to study the influence of parameters and conditions of the operational characteristics of the shock absorber.

Effect of inhomogeneous turbulent transport capacity flow general strain of open channel

A.D. Kovalev

Research the formation of channel and floodplain flows under the influence of hydraulic engineering structures, including bridges, are the necessary and at present time. The urgency of this problem is due to quality early assessment of the effects of artificial changes in river flow regime. The decision of the number of theoretical and applied problems are closely connected with the structure of turbulent channel. These circumstances caused the large number of experimental studies of kinematic structure of turbulent flow characteristics of turbulent relationships with Averaged flow characteristics in laboratory and natural conditions

Deriving equations for the flow rate in scoured bridge approach section




Coming from the mathematical model of river-bed deformations, which is based on equation of alluviums balance, it is got the differential equation for a flowrate in a subbridge river-bed taking into account the wash-out of this. It showed that it behaves to the class of homogeneous equations of I (first) order and it can be lead to equation of transfer. The decision of the Cauchy appropriate task is got.

Design features of roads in areas of distribution ravines




Paper explores planning roads in the areas where ravines are widespread. Different methods of waste watering, depend on different cases how road is located against ravines, are analyzed. Calculation costs of filtration because of crossing ravine by the road are analyzed and compared.

Time of concentration and maximum rate of sewage from rain rectangular drainage basins with trays the bottom


The paper presents an improved method of hydraulic calculation of the peak discharge and time of concentration of the stormwater runoff from rectangular watersheds with collecting channel with rectangular cross-section, situated along the bottom side of the catchment. The method takes into account the relationship between time of concentration and design rainfall intensity. A computer program calculating the time of concentration and the peak storm water discharge, depending on the values of input parameters, is presented.