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High Speed Turbine with Non-Uniform Cascade
Stareček, Jakub ; Drábková, Sylva (referee) ; Veselý, Jindřich (referee) ; Haluza, Miloslav (advisor)
This doctoral thesis is focused on hydraulic design of axial turbine by CFD and FEM analyses. The results are runners with nonuniform cascades. Nonuniform runners consist of blades with different axial positions, blades with different pitch angles in runner or indifferent blades. Each runner is designed with respect to 3D printing by FDM or SLS technology and hydraulic measuring. The analyses of the excitation frequencies, modal analysis, shape of the turbine operating range, maximal efficiency, output parameters and cavitation properties are emphasized.
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A study of the vortex flow structures in heart compensation devices
Dokoupil, Michael ; Habán, Vladimír (referee) ; Fialová, Simona (advisor)
This master thesis is focused on study and description of flow in heart assistance devices. The aim was to evaluate the state of art for cardiac supports, selection of one device concept and improve the existing pump model. The types of heart replacements were evaluated in the research part of this work. Based on the research, an axial intraventricular pump was chosen for the simulation. The flow simulation was performed using computational fluid modeling. During the evaluation, special emphasis was placed on the description of vortex structures typical for cardiac support and analysis of hemolysis caused by the device.After selecting the optimization parameters, a design of a pump model was improved, which met the set optimization goals, especially the increase in efficiency and decrease of shear stresses. Towards the end of the work there was a discussion about the evaluation of hemolysis and vortex structures. In the end, particular possibilities for further improvement of the optimized pump were presented.
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Centrifugal radial submersible water pump driven by hydrostatic motor
Holan, Jan ; Vlašic, František (referee) ; Nevrlý, Josef (advisor)
Bachelor thesis is aimed to a design of radial underwater pump with hydrostatic powertrain. Thesis contains base knowledge and working principles of water pumps and parts of hydrostatic powertrain. The other part is aimed to detail description of design and issues related to a water pump design. Thesis was created in cooperation with Center of hydraulic development (CENTRUM HYDRAULICKÉHO VÝZKUMU, spol. s r.o.).
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Provozní porovnání sklízecích mlátiček s rozdílným typem mlátícího a separačního zařízení
SUCHÝ, Václav
The bachelor thesis focuses on theoretical but also practical comparison of combine harvesters with different types of threshing and separating equipment and their historical development. The theoretical part describes the individual parts of these agricultural machines and mentions various possibilities of their implementation. The practical part is focused on the objective examination of the main parameters characterizing the performance and quality of the threshing machine and their comparison among the main competitors of today's supply. The selected technologies are tangential (conventional) and axial (unconventional) threshing and separation mechanisms.
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A study of the vortex flow structures in heart compensation devices
Dokoupil, Michael ; Habán, Vladimír (referee) ; Fialová, Simona (advisor)
This master thesis is focused on study and description of flow in heart assistance devices. The aim was to evaluate the state of art for cardiac supports, selection of one device concept and improve the existing pump model. The types of heart replacements were evaluated in the research part of this work. Based on the research, an axial intraventricular pump was chosen for the simulation. The flow simulation was performed using computational fluid modeling. During the evaluation, special emphasis was placed on the description of vortex structures typical for cardiac support and analysis of hemolysis caused by the device.After selecting the optimization parameters, a design of a pump model was improved, which met the set optimization goals, especially the increase in efficiency and decrease of shear stresses. Towards the end of the work there was a discussion about the evaluation of hemolysis and vortex structures. In the end, particular possibilities for further improvement of the optimized pump were presented.
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High Speed Turbine with Non-Uniform Cascade
Stareček, Jakub ; Drábková, Sylva (referee) ; Veselý, Jindřich (referee) ; Haluza, Miloslav (advisor)
This doctoral thesis is focused on hydraulic design of axial turbine by CFD and FEM analyses. The results are runners with nonuniform cascades. Nonuniform runners consist of blades with different axial positions, blades with different pitch angles in runner or indifferent blades. Each runner is designed with respect to 3D printing by FDM or SLS technology and hydraulic measuring. The analyses of the excitation frequencies, modal analysis, shape of the turbine operating range, maximal efficiency, output parameters and cavitation properties are emphasized.
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Postural physiotherapy concentrated at axial stabilization of actively sporting children on a competitive level
MAŠEK, Dominik
This work is focused on the topic of stability of the axial system at actively sporting children on the competition level. In the theoretical part I write about basic knowledge about the postural system and deep stabilization system. The practical part of my thesis is processed as a qualitative research comprising input and output kinesiology analysis and input and output posturographic examination. The research took place at the Uran office at the University of South Bohemia, České Budějovice. The research sample was consisted of five actively sporting pediatric patients (two boys and three girls) aged 6 to 11 years. Three patients (two girls and a boy) do gymnastics and two patients (a girl and a boy) do the Korean martial art called Taekwondo. Therapy contained eight treatments lasting 15-20 minutes. Rehabilitation therapy included posturograph with NeuroCom Balance Manager system. Another three exercises were practiced individually at home. The aim of this work was to improve the axial stabilization using therapeutic programs and additional exercises and then subsequent evaluation of the results of these eight treatments. Here I follow the idea, that even short exercising of deep stabilizing deep system during training can lead to an overall improvement in the stabilization of the body, reducing the level of hazing superficial muscles and preventing the occurrence of clinical symptoms and complications, that are common in modern society, such as back pain, prolapsed intervertebral discs, etc. Results obtained by therapy proved that patients' axial stability and overall posture im-proved after eight therapies. This thesis may serve as a resource not only for health care workers, but also for the general public and sports coaches.
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Centrifugal radial submersible water pump driven by hydrostatic motor
Holan, Jan ; Vlašic, František (referee) ; Nevrlý, Josef (advisor)
Bachelor thesis is aimed to a design of radial underwater pump with hydrostatic powertrain. Thesis contains base knowledge and working principles of water pumps and parts of hydrostatic powertrain. The other part is aimed to detail description of design and issues related to a water pump design. Thesis was created in cooperation with Center of hydraulic development (CENTRUM HYDRAULICKÉHO VÝZKUMU, spol. s r.o.).
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