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Elements reducing pressure in pipeline systems
Kohút, Jiří ; Kůrečka, Jan (referee) ; Himr, Daniel (advisor)
The aim of the bachelor thesis is to provide a comprehensive overview of control elements in piping systems. The fluid at different flow rates exhibits different behavior and due to the fluid contact with the pipeline, pressure losses occur. Elements in piping systems meet various requirements such as pressure control, flow rate control, barrier and flow direction control. The thesis deals with the categories description and functional priciples of individual elements. The practical part consists of the laboratory measurement describing characteristic of one of the pressure control elements, namely the pressure reducing valve. The measured characteristic is compared to characterstic from a company called Malgorani.
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Influence of vehicle radiator pressure drop on its aerodynamic drag
Pavlovič, Matúš ; Blaťák, Ondřej (referee) ; Vančura, Jan (advisor)
This diploma thesis focuses on numerical simulation of DrivAer vehicle model with different pressure losses of the radiator. CFD models of the vehicle in Estate body version for individual type of riadiator are created, together with a radiator and a simplified engine compartment. The aim of this work is to compare characteristics of conventional aluminium radiator with characteristics of polymeric prototype radiator and their impact on aerodynamic drag of the vehicle.
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LabVIEW drivers for resistor decade
Procházka, Matěj ; Čala, Martin (referee) ; Havlíková, Marie (advisor)
This bachelor's thesis deals with description resistance decade M63x and M64x from Meatest company. I described functions and possibilities of remote access. Further are described how it's developed instrument driver in LabVIEW. At the end is cited how I conduct with testing this driver.
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Aerodynamics of race car underbodies
Martínek, Tomáš ; Vančura, Jan (referee) ; Čavoj, Ondřej (advisor)
The aim of this bachelor thesis is clarifying principle of downforce, which is originating by ground effect. The thesis consists of theoretic description of this phenomen, explanations of ground effect on the racing circuit and presentation of several examples working with this effect.
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Nontraditional methods for correction of leading wires resistance
Drahokoupil, Petr ; Havránek, Zdeněk (referee) ; Beneš, Petr (advisor)
This bachelor`s thesis deals with the question of elimination leading wires resistances. This negative effect is major issue in temperature measurement when using resistive sensor. Work analyse basic methods and their principle of compensation negative effect . Then it covers nontraditional methods and their principle. There is a scheme of current look described in detail in this work, which is being used to eliminate leading wires resistances. Part of the work is a simulation of this look and comparison with measurement.
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Frequency filters controlled via microprocessors
Bronec, David ; Kincl, Zdeněk (referee) ; Biolková, Viera (advisor)
This thesis is focused on the microprocessor-controlled frequency filter project. The main goal of the thesis is to present basic terms and principles of frequency filters and active frequency filters for cascading synthesis. Furthermore, the work contains information on digital potentiometers. The thesis includes circuit simulations and a project of connecting with a printed circuit board. The last chapter contains the results of the measurements.
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Hodnocení faktorů ovlivňující akcelerační vlastnosti vozidel
Cienciala, František
This thesis focuses on the description of factors influencing vehicle acceleration and examines their effect. The theoretical part of the thesis targets resistances affecting vehicle during its motion, during both uniform motion and acceleration. Furthermore, the thesis is devoted to the transfer of the driving force from the engine to the wheels and from the wheels to the road surface, in addition to the description of various types of engines and gearboxes. The experimental part of the thesis examines selected factors notably weight, type of drive and methods of shifting that affect acceleration and its movement. For each of aforementioned factors, the unique measurement method was established using an accelerometer installed in the vehicle. The results were then processed into graphical form and interpreted. As the results of the experimental part revealed, all selected parameters have a significant impact on the vehicle acceleration. The effect of the weight could be observed primarily on acceleration values while the type of drive and methods of shifting affects predominantly the course of the acceleration.
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Aesthetic and emotional evaluation of butterflies and moths (Lepidoptera) and its implications
Končická, Anna ; Frynta, Daniel (advisor) ; Sedláček, František (referee)
Animals play a significant role in human societies. As significant psychological stimuli, they evoke not only positive but also negative emotions. Human efforts on animal conservation are directly linked to the way in which those animals are aesthetically percieved. This master's thesis is focused on the aesthetic and emotional evaluation of butterflies and moths, using a method of ranking visual stimuli and scoring on a point scale. The aim of this thesis is both to compare various methods of beauty evaluation among a group Lepidoptera and to analyze the influence of butterflies' position on presented stimuli on the resulting beauty evaluations. Furthermore, this thesis focuses on negative emotions (disgust) evoked by butterflies and moths. Last but not least, the influence of morphological and color characteristics of butterflies and moths on beauty evaluations is analyzed. The characteristics and attitudes of respondents are also analyzed as a possible influential factor of the evaluation. It was found that all investigated testing methods could be used to evaluate the beauty of butterflies and moths and that they produced similar results. It was also found that wing positions of butterflies and moths have a particularly notable effect on their beauty evaluations, especially for certain species....
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Car chassis diffuser
Kindl, Albert ; Balko, Marek (referee) ; Rudolf, Pavel (advisor)
Improving a car's aerodynamic properties can save fuel, increase range, or improve speed and handling. To achieve this, aerodynamic modifications and improvements are proposed to cars. The aim of this thesis is to describe a diffuser on an automotive chassis. The focus is mainly on the effect of its divergence angle on drag and lift. These dependencies are investigated on a simplified car model using CFD simulation in Ansys Fluent. The research section discusses the diffuser flow and losses, other important aerodynamic features and the importance of the diffuser in Formula 1 and passenger cars. The results of the thesis show the significant effect of the diffuser on the downforce and drag of the vehicle and indicate the important position of this element in the future of the automotive industry.
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