Applied Hydromechanics

Major: Hydrotechnical Construction, Water Engineering and Water Technologies
Code of subject: 7.194.01.O.004
Credits: 4.50
Department: Department of Hydraulic and Water Engineering
Lecturer: Hnativ R.M.
Semester: 1 семестр
Mode of study: денна
Learning outcomes: AP 2. Know the theory and methods of research planning, modern methods and methods of research, relevant equipment and apparatus. AP 3. Know the methodology of performing hydraulic, hydraulic and other engineering calculations of water management systems and their elements, taking into account their interconnection and interaction. AP 4. Know the laws and methods of modeling processes and phenomena in the field of water management and environmental engineering. AP 5. Know specialized information and communication technologies and modern computer software in the professional field. AP 9. Know the methods and tools for studying the current state of water management, hydraulic and environmental systems, modeling and forecasting its changes over time. ZPS 1.2. Know the theory of hydromechanics and applied hydromechanical methods used in modeling and analysis of processes, phenomena and modes of operation of water management systems and their elements.
Required prior and related subjects: Previous disciplines: - Higher mathematics; - Physics; - Theoretical mechanics; - Strength of Materials. Related and the following disciplines: - Technical mechanics of liquids and gases. - Hydraulic structures. - Hydraulic and aerodynamic machines, pumping stations. - Soil mechanics, foundations and foundations.
Summary of the subject: 1. Introduction. Characteristic properties of drip liquids as a medium of motion: Different physical states of matter. The equation of state of water. Adiabata Tate. Water viscosity. Surface tension. Similarity and features of modeling of drip fluid flows. 2. Mathematical models of drip fluid flows: Basic hypotheses and concepts of continuous environment, coordinate system. Kinematics of fluid flows. Kinematics of potential currents. General equation of balance. System of equations of motion of dripping liquid. Dynamics of flows of a non-viscous (ideal) fluid. Force interaction of bodies in a stationary flow of a viscous fluid. Water flow model taking into account compressibility in the acoustic approximation. Mathematical model of the flow of a viscous incompressible fluid. Mathematical model of turbulent fluid flows. Boundary layer theory. Forms of description of hydrodynamic forces and moments. 3. Hydrostatics. Forces and moments in hydrostatics: Equation of fluid equilibrium at rest. The force of the liquid at rest on a solid wall. The force of a liquid on a body immersed in it, Archimedes' law. The problem of the Archimedean force as part of the general hydrodynamic problem. Forces and moments of hydrostatic nature in the connected coordinate system. 4. Hydrodynamic forces and moments of inertial nature: Two ways to describe the force interaction of the body with the fluid. Kinetic energy of fluid flow. Hydrodynamic forces and moments of inertial nature. Force interaction of a solid with an ideal fluid during its stationary motion. Numerical methods for determining unit potentials and joining masses. Algorithms for calculating the attached masses of bodies of complex configuration. 5. Surface waves. Hydrodynamic forces of wave nature: Characteristics of wave fluid flows. Free flat gravitational waves. Waves on the surface of a liquid during the motion of a submerged body. Spatial waves in a real liquid. 6. Hydrodynamic forces and moments of circulating type. Hydrofoil theory: Bearing properties of the wing of infinite elongation. Bearing properties of the wing of ultimate elongation, inductive resistance. Hydrofoil near the free surface. Steering forces and moments of stabilization and management bodies. 7. Hydrodynamic forces caused by the viscosity of a liquid: Frictional resistance of the plate, which is flowed longitudinally by the liquid. Viscous resistance of rotating bodies and bearing surfaces. Positional forces and moments of the body. Damping hydrodynamic forces and moments. Fluid flow control in the wall layer. 8. Fluid flows with developed cavitation: Classification of types, stages and forms of cavitation development. Calculation of the beginning of cavitation. Basic assumptions and flow patterns of the classical theory of advanced cavitation. Flat problems of developed cavitation currents. Axisymmetric flows with developed cavitation. Numerical and approximate calculation methods. Non-stationary axisymmetric caverns. The principle of independence of the expansion of the cavity. Spatial caverns in currents with perturbations. Ventilated caverns. 9. Hydrodynamic loads at the entrance of bodies into the liquid: General characteristics of currents and principles of construction of calculation models. Impact of a floating body to a liquid. Vertical penetration into the water of the body of rotation without the angle of attack. Asymmetric immersion of rotating bodies in water. Penetration of a flat contour. Cavernous formation and load in the transition stage.
Assessment methods and criteria: Current control (PC): 30. Examination control: - written component 40 - oral component 30. Total for the discipline: 100.
Recommended books: Basic 1. Yakhno О.М. Applied hydroaeromechanics and mechanotronics: textbook / O.M. Yakhno, O.V. Uzunov, O.F. Lugovsky and others. ; for order. O.M. Yakhna. - Vinnytsia: VNTU, 2017. 711 p. 2. Loitsyansky L.G. Mechanics of liquid and gas / L.G. Loitsyansky.- M., Science.- Textbook for students. universities.- 1987. 736 p. 3. Fedorets V.O. Technical hydromechanics. Hydraulics and hydropneumatic drive: Textbook / V.O. Fedorets, M.N. Pedchenko, O.O. Fedorets, V.B. Strutynska, O.M. Yakhno, Yu.V. Yeliseyev; For order. V.O. Fedorets. - Zhytomyr: ZHITI, 1998. 412 p. 4. Asatur K.G. Hydromechanics / K.G. Asatur, B.S. Makhovikov.- M .: St. Petersburg. Mining Institute, 2001.- 253p. 5. Belevich M.Yu. Hydromechanics. Fundamentals of classical theory. Textbook. SPb., Ed. RGGMU, 2006.- 213 p. 6. Popov D.N. Hydromechanics: Textbook for universities / D.N. Popov, S.S. Panaiotti, M.V. Ryabinin; ed. D.N. Popov. M .: Publishing house of MSTU im. N.E. Bouman, 2002.384s. Additional 1. Galin G. Ya. Continuum mechanics in problems / G. Ya. Galin, AN Golubyatnikov et al. - Ed. M. E. Eglit. M .: T. 1, 2.- 1996. 2. Landau LD Theoretical physics. In 10 volumes.Vol. VI. Hydrodynamics / L.D. Landau, E.M. Lifshits, Moscow: Nauka, 1988, 936p. 3. Prandtl L. Hydroaeromechanics / L. Prandtl.- Izhevsk: Research Center "RHD", 2000.- 576p. 4. Morgunov K.P. Hydromechanics / K.P. Morgunov.- SPb, SPGUVK, Textbook.-2007.- 263 p. 5. Shashin V.M. Hydromechanics: Textbook. for tech. universities .- M .: Higher. shk., 1990.- 384s. 6. Kochin N. E. Theoretical hydromechanics / N. E. Kochin, I. A. Kibel, N. V. Rose.- M .: Vol. 1.2. - 1983 7. Sedov L.I. Continuum mechanics / L.I.Sedov.- Moscow: T. 1, 2.- 1973.