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Original title in Czech: Konstrukční a procesní inženýrstvíFSIAbbreviation: D-KPIAcad. year: 2011/2012Specialisation: Fluid Engineering
Programme: Machines and Equipment
Length of Study: 4 years
Accredited from: Accredited until: 1.3.2016
Profile
Design and Process Engineering · Designing, construction, calculation, technology of manufacturing, technical preparation of manufacturing including assembly and testing, · Thermal and nuclear power plant devices such as steam and combustion turbines, steam generators, steam power plants and heating plants including nuclear power stations, industrial power engineering and their environmental aspects, · Water turbines, hydrodynamic and hydrostatic pumps, piping systems, hydroelectric power plants, and pumping stations, · Machinary and devices for chemical industry, food-stuff industry, and biotechnological treatment lines, · Construction, modelling and theoretical studies of machines and devices for cutting, forming machines, industrial robots, and manipulators, · Machine parts and mechanisms, methodology of designing machine elements and working mechanisms of general application with consideration of stochastic qualities of inputs, including the application of special types of machines and devices, · Cars, vans and lorries, buses, trailers, semi-trailers, and motorcycles, · Combustion engines for all types of vehicle drives, simulation of combustion engine thermomechanical systems, dynamics of driving gear, engine accessories, ecology, · Machines and devices for in-plant handling of material and handling between operations, for the mining and transport of building materials, for passenger conveyance in buildings, · Aerodynamic calculation and designing, flight mechanics, fatigue and durability of aircraft constructions, aeroelasticity of aircraft, · Quality of machine industry production.
Guarantor
prof. Ing. Václav Píštěk, DrSc.
Issued topics of Doctoral Study Program
It is possible to solve fluid flow by using distribution of vorticity in the fluid domain. New analytical formulas for velocity profiles in pipes of circular cross-section and between two parallel plates was derived at the department of Fluid Engineering V. Kaplana. These analytical formulas can be used for both laminar and turbulent flow. The power coefficient appears in these formulas. It depends on the Reynolds number, pressure drop and flow rate. The tasks of this work are: -the experimental verification new the analytical formula of velocity profile for the pipe of the circular cross-section. -the extension of this formula for the pipe with the no circular cross-section -the determining of the influence of the wall roughness and the wettability on the velocity profile formula.
Tutor: Štigler Jaroslav, doc. Ing., Ph.D.
Dynamic forces act on the impeller/runner during the operation of the hydraulic machine. The aim is to measure those forces (both axial and radial) experimentally for different regimes of operation.
Tutor: Habán Vladimír, doc. Ing., Ph.D.
Water tanks in the summer contain little oxygen. Its shortage has a major impact on the reproduction of microorganisms, especially cyanobacteria. This phenomenon can be successfully faced by mixing water with high oxygen content at the surface of the water with water near the bottom. The aim of the study is to optimize the hydraulic mixing, using special pumps and nozzles developed for this purpose. Computational and experimental modeling will be extensively used. Study will be supported by upcoming MPO project.
Tutor: Pochylý František, prof. Ing., CSc.
Disc friction losses present substantial part of the overall hydraulic loss in low specific speed hydraulic machines. The aim of the PhD thesis will be analysis of the disc friction loss origin and study of the influence of the shape in between the rotor and stator discs on magnitude of the disc friction loss. Experimental and computational modeling will be applied.
Tutor: Rudolf Pavel, doc. Ing., Ph.D.
Pump is based on two principles: centrifugal pump + side channel pump. Aim of the study is optimization of both principles, especially for low specific speed pumps.
Same model for computation of hydraulic losses is used for steady and unsteady flows in numerical modeling. However this approach is very inaccurate when damping is evaluated. Losses can be modeled using the second viscosity, but for high steady velocities its influence should be included into the model.
The inducer in front of the runner is used for improvement of cavitation properties of the impeller. The thesis will be aimed on improvement of hydraulic design of inducer in front of the runner.
Tutor: Haluza Miloslav, doc. Ing., CSc.
When the liquid flows in a magnetic field, a so called Lorentz force arises, which affects the velocity profile. In anisotropic environment density and viscosity of liquids also can also affected by the magnetic flux. In this case, fluid has non-newtonian behavior. Using this interaction electromagnetic field can be utilized for example in the design of new journal bearings and seals. The study will be supported by project of GACR. The necessary experiments are provided in conjunction with the Department of Power Electrical and Electronic Engineering
Decomposition of the velocity and pressure fields into eigenmode shapes presents a different view on the flowing liquid. Decomposition methods will be applied especially to swirling flows (e.g. vortex rope in hydraulic turbine draft tube) within the frame of the PhD thesis.
The Q - Y curve is the specific energy depending on the discharge. Some pumps have unstable characteristic, which is not good for the pump running. The research of characteristic stability and hydraulic modification for better stability is very necessary.
Spiral case of an impeller pump is a part of the pump which participate on overall characteristic of the pump. There is an origin of hydraulic losses, radilal force and phenomenons connected with flow in the inner part of the pump. The aim of this theme is minimalization of hydrulic losses and radial force by alternative methods than since used.
Aim of the proposed postgradual study is investigation of the cavitating structures induced by rotation of liquid. The research will be carried out on a test circuit, where spectral properties of the cavitating flow will be measured and cavitating structures will be visualized. Computational modeling based on cavitation models in present CFD softwares will also be a part of the study. Transition between straight vortex rope and spiral vortex rope will be sought in connection with inlet velocity profile and domain shape. PhD study will proceed along with work on the grant project GAČR 101/09/1715 Cavitating vortical structures induced by rotation of liquid.
Spiraling vortical structures are important source of dissipation, i.e. they decrease efficiency of rotating machines. The aim of PhD thesis is analysis of the swirling flow with respect to dissipated power and verification using CFD.
The aim doctoral study is a design of special jet with possibility of air leech onto. The solution will be based on computational modelling two-phase flow in the jet. The jet will be designed with respect to using the cooling (cylinders in rolling of sheet metal, instruments). This study will be supported by MPO project.
The medical equipment uses disk pump. The force transmitted to the liquid depends on the shear stresses. Their value is significant for the degradation of blood cells. It is therefore necessary to optimize the value of shear stress due to dissipation of mechanical energy. A similar problem is the water turbines where the blades are replaced by the shear forces. The aim of the study is therefore to optimize power imparted to the fluid by shear, given the value of the dissipation function. The project will be supported by specific research of the FME. Experiments will be carried our in the laboratory of the Department of Fluid Engineering V. Kaplan.
All current valves are source of hydraulic loss. Aim of the PhD study is design of a new hydraulic valve, which will be based on low specific speed turbine. Design of the turbine will reflect the loss characteristic curve of the valve. This will ensure 50% recuperation of the supplied energy. Solution will be based on computational modeling of the turbulent flow and experimental research. PhD study will be supported by Strojirny Brno inc.
The Boundary Vorticity Elements Method with Continuous Distribution Vorticity has a promising future in area of vortex fluid flow modeling. This method brings a new aspects and possibilities in this area. Basic theoretical principles of this method have been developed. It is important to verify and the possibilities of this method on the practical examples. It is important to choose proper boundary conditions for vorticity distribution or choose proper method to fulfilling the Kuta-Zukovskij condition of smooth profile outflow.
The aim is study of the dynamical properties and stability of the vortex rope in hydraulic turbine draft tube using the methods applied for non-linear systems and chaos theory.
Study plan wasn't generated yet for this year.