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Response surface method in connection with CFD for shape optimization
Pleva, František ; Štefan, David (referee) ; Rudolf, Pavel (advisor)
This thesis is focused on shape optimization of Venturi´s nozzle with optimization method called response surface method. The first part of this work is concerned with the description of this method as well as explaining the basic principle. Furthermore, there is an explanation of the application of this method in synchronicity with CFD and its operating algorithm. The second part of this thesis is then focused on simple example with plane wing and simplified optimization of Venturi´s nozzle in which this method was tested. In the third part there is described full multiparameter shape optimalization of the nozzle for two geometries.
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Venturi nozzle shape influence on hydrodynamic cavitation
Mračko, Patrik ; Balko, Marek (referee) ; Rudolf, Pavel (advisor)
Thesis focuses on the influence of various differently shaped diffusers of Venturi nozzle on the cavitation, which occurs during flow of liquid through said nozzle. Several models with different shapes of diffuser's wall were designed. Cavitation in these models was then investigated with numerical calculation. Two physical nozzles were made according to designed models and tested on experimental circuit. As part of the experiment, the cavitation inside the nozzles was measured with flow of liquid corresponding to a large range of cavitation numbers. Results of this experiment were used to determine which model of the nozzle is more effective in creation of a cavitating flow.
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Hydrodynamic cavitation in minifluidic Venturi nozzle
Zeman, Radek ; Hudec, Martin (referee) ; Rudolf, Pavel (advisor)
This thesis deals with cavitation on a small scale. Conducting experiments on a small scale helps to save time, space, and most importantly money needed for research. Low-energy operation on small scales could accelerate the development of larger-scale devices for practical use in industry. Hydrodynamic cavitation has proven to be a potentially useful tool for some industrial applications, such as water purification. In the practical part of this thesis, a cavitation visualization device operating with flow rates in milliliters per second is proposed. Devices similar to this one could be used in the near future to obtain the benefits previously mentioned, and thus promote research in the field of water purification using hydrodynamic cavitation.
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Transition of cavitating flow to supercavitation
Chovanec, Radomír ; Fic, Miloslav (referee) ; Rudolf, Pavel (advisor)
Bachelor thesis consists of two parts. The first part is dedicated to research. It deals with clarifying the basic concepts of cavitation and current knowledge in the field of supercavitation. The second, experimental part is devoted to flow in Venturi nozzle in the transition from developed cavitation to supercavitation. The aim was to examine the hysteresis that occurs with a change of transition direction. To clarify the phenomenon were compared static and dynamic characteristics acquired from the measurement and visualization on the hydraulic circuit with cavitation jet.
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Hydrodynamic cavitation in minifluidic Venturi nozzle
Zeman, Radek ; Hudec, Martin (referee) ; Rudolf, Pavel (advisor)
This thesis deals with cavitation on a small scale. Conducting experiments on a small scale helps to save time, space, and most importantly money needed for research. Low-energy operation on small scales could accelerate the development of larger-scale devices for practical use in industry. Hydrodynamic cavitation has proven to be a potentially useful tool for some industrial applications, such as water purification. In the practical part of this thesis, a cavitation visualization device operating with flow rates in milliliters per second is proposed. Devices similar to this one could be used in the near future to obtain the benefits previously mentioned, and thus promote research in the field of water purification using hydrodynamic cavitation.
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Venturi nozzle shape influence on hydrodynamic cavitation
Mračko, Patrik ; Balko, Marek (referee) ; Rudolf, Pavel (advisor)
Thesis focuses on the influence of various differently shaped diffusers of Venturi nozzle on the cavitation, which occurs during flow of liquid through said nozzle. Several models with different shapes of diffuser's wall were designed. Cavitation in these models was then investigated with numerical calculation. Two physical nozzles were made according to designed models and tested on experimental circuit. As part of the experiment, the cavitation inside the nozzles was measured with flow of liquid corresponding to a large range of cavitation numbers. Results of this experiment were used to determine which model of the nozzle is more effective in creation of a cavitating flow.
|
|
|
Response surface method in connection with CFD for shape optimization
Pleva, František ; Štefan, David (referee) ; Rudolf, Pavel (advisor)
This thesis is focused on shape optimization of Venturi´s nozzle with optimization method called response surface method. The first part of this work is concerned with the description of this method as well as explaining the basic principle. Furthermore, there is an explanation of the application of this method in synchronicity with CFD and its operating algorithm. The second part of this thesis is then focused on simple example with plane wing and simplified optimization of Venturi´s nozzle in which this method was tested. In the third part there is described full multiparameter shape optimalization of the nozzle for two geometries.
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