National Repository of Grey Literature 153 records found  1 - 10nextend  jump to record: Search took 0.02 seconds. 
Cross-flow turbine - reverse engineering
Řeha, David ; Haluza, Miloslav (referee) ; Hudec, Martin (advisor)
This thesis deals with the reverse engineering of the cross-flow turbine. The departement of fluid engineering was given a model of the cross-flow turbine many years ago, however it has never been put into service and nothing is known about it. This thesis describes the analysis of the turbine design, the replacement of parts that occurred to bring the turbine into service, and how the turbine was modified for the process itself. Furthermore, based on the dimensions obtained estimation of the parameters, for which the turbine was designed, was carried out. A measurement track was set up for that purpose and the turbine was measured in the laboratory conditions. Real values of the turbine parameters and the subsequent evaluation of the universal characteristics of the turbine were obtained by the measurement. This thesis includes also the construction of a measurement tutorial for students.
Hydrokinetic swirl turbine
Fryčar, Michal ; Veselý, Jindřich (referee) ; Haluza, Miloslav (advisor)
There has been a notable increase in interest in renewable energy harvesting over the past two decades. This has been accompanied by the emergence of new technologies and research, which are driving developments in this area forward. One of the sources is also kinetic energy of river streams and tidal currents. The aim of this thesis is to formulate fundamental equations for the utilisation of kinetic energy of water and to design a hydraulic model of a swirl turbine runner. A further aspect of this thesis is to verify the previously formulated equations in the computational modelling software Ansys CFX and to analyse the effect of the draft tube on the power output of the turbine.
Hydraulic solution of the swirl turbine for locality of Rosenauer mill
Pavlíček, Tomáš ; Veselý, Jindřich (referee) ; Haluza, Miloslav (advisor)
This thesis focuses on the design of a swirl turbine for the site of Rosenauer Mill, where the gross hydraulic head HB is 1 m and the flow rate is Q is 1.6 m3/s. The beginning of the work is dedicated to microturbines and explains why a swirl turbine is suitable for this location. The procedure applied for developing the hydraulically active surfaces of the turbine is then presented. Firstly the design of the blades is based on analytical formulas, which are further refined using the CFX Ansys program. The turbine is closely affected by the inlet and draft tube, therefore their design is also included in this thesis. The hydraulic calculations yield the resulting parameters and characteristics of the designed turbine, calculated from the entire assembly using CFD computations. The final section of the work is devoted to the design of main structural components such as the gear, shaft, and bearings. The hydraulic design developed in this thesis serves as the basis for implementing the swirl turbine and constructing a small hydraulic power plant at the Rosenauer Mill.
The influence of decreasing of impeller diameter, change Q - Y characteristic
Hyriak, Maroš ; Habán, Vladimír (referee) ; Haluza, Miloslav (advisor)
The purpose of the thesis is to familiarize with the fundamental characteristics of ta centrifugal pump while changing geometry of the output section of its impeller trimming. Characteristics of a pump is calculated whilst diameter of the impeller is changed. More specifically, changes in the flow and energy are observed while diameter of the impeller is decreasing. Two possible solutions, approximate and accurate, are offered for both parameters. The thesis suggests that an application of the approximate solution is satisfactory for the flow calculation of the impeller. In contrast, for the energy calculation is the approximate solution sufficient only in case of the slight trimming. Increase in the trimming results in the drop of the hydraulic efficiency and decrease in the accuracy of the results. Consequently, the accurate solution is recommended for the energy calculations. Limitations of the paper may be represented by two facts. First, in comparison with the calculations, results are in reality affected my numerous variables that have not been included in the calculations due to their unpredictability. Second, calculations were based on the several assumptions that are rarely met in the reality. The results of the thesis are applicable in the every-day life when adapting the pump to the customer needs.
Spiral case design for fountain turbine Katovice.
Čípa, Jiří ; Veselý, Jindřich (referee) ; Haluza, Miloslav (advisor)
The diploma thesis should identify inconsistencies of the small hydraulic power plant Katovice. The fountain water turbine is now running in slower delivery because the original Francis high speed turbine achieved much smaller flow than a Kaplan type turbine. The aim of the thesis is a project of a spiral case and a distributor for the Kaplan turbine, which should work in higher flow and should be run in its optimum. This project will serve as a base for construction of distributor and spiral case for the small hydraulic power plant Katovice.
Emptying of the rotating vessel
Hideghéty, Attila ; Koutný, Luděk (referee) ; Haluza, Miloslav (advisor)
This bachelor´s thesis handles with happenings related to hydromechanics. For all stands Euler´s equations of hydrostatics, hydrodynamics and Bernoulli´s equation. The water has got a characteristic surface in the rotating vessel, by increasing the revolutions the water begins to pour out. The task is analyzing the events that can occur when the vessel is rotating with the water.
The influence of the impeller diameter decreasing on the pumps characteristic
Jelen, Richard ; Haluza, Miloslav (referee) ; Habán, Vladimír (advisor)
This master’s thesis deals with changing the geometry of the output section of the impeller of the radial centrifugal pumps and its influence on the characteristics of the pump. In engineering practice for these radial centrifugal pumps it is possible to change the parameters based on the requirements. This adaptation of parameters is called impeller trimming. Impeller trimming means the reduction of the impeller diameter thereby decreasing the flow, head and efficiency. Existing equations for calculating the changes in the characteristics of the impeller trimming are inaccurate. In this thesis is describes a possible method of putting for the recalculation characteristics of a pump based on the impeller diameter on the available characteristics of pumps.
Hydraulic solution of the wide - range runner of the impeller
Smíšek, Tomáš ; Pochylý, František (referee) ; Haluza, Miloslav (advisor)
The aim of the diploma thesis is to design the pump impeller. The classical design of the impeller is made for one operating point, in which pump is assumed to operate most of the time. The aim of this diploma thesis is to design a pump, whose pump cover and pump drive discs are designed for each other operating point and then compare the results of both design methods.
The wide range impeller.
Wojnar, Pavel ; Žák, Radim (referee) ; Haluza, Miloslav (advisor)
The aim of the thesis was to propose a pump impeller with higher effectiveness and verify the proposal with the calculation using programs Gambit and Fluent. Three designed impellers were afterwards made using 3D printer and its characteristics were measured in a hydraulic laboratory in Kaplan Department of hydraulic machines. The proposal of a so called wideband impeller of the centrifugal pump was made with chaotic ordering of blade cascades, in one impeller occur blades with various input and output angles and different shapes of blades but all blades have got similar shape in a meridian sectional view of impeller. The thesis was divided into three parts. In the first part, a conforming transformation was theoretically described which was in the thesis used for the shape proposal of impeller blades. In the second part of the thesis final proposals and calculations of pump impellers were made. The third part of the thesis focused on the processing and evaluation of experimental measurement in the hydraulic laboratory and finally the results of the thesis were summarized in the conclusion.
Modeling of surface waves
Zgabaj, Martin ; Haluza, Miloslav (referee) ; Franců, Jan (advisor)
This bachelor's thesis presents the derivation of basic characteristics of surface waves which includes the dispersion relation, the shape of the wave, the phase velocity, the group velocity and the movement of water particle. Thesis deals with both deep-water waves and shallow-water waves. Derived characteristics are examined in both cases. In the last part of thesis there are specific examples of those two types of waves.

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