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Study of transverse velocity field in the vicinity of rotating wheel with assumption of forced convection of disc brake
Regner, Dominik ; Polanský, Jiří (referee) ; Štefan, David (advisor)
The master thesis deals with the influence of a local change of temperature due to advection from disc brake to axial velocity field close to the rotating wheel of a car. The second goal is to set parameters applicable to various wheel discs and study of the influence of these parameters to aerodynamical properties of car and thermodynamical properties of the disc brake. The thesis is numerically executed in StarCCM+. The first part focuses on theoretical background about the numerical solution and current status of research. There are described disc parameters, geometry input and solver settings in the second part. The final part deals with a comparison of velocity fields for isothermal and thermodynamical model and evaluates the influence of parameters to velocity field, aerodynamical drag and thermodynamical performance of the brake.
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Axles of modern trucks
Vávra, Radek ; Vopařil, Jan (referee) ; Kučera, Pavel (advisor)
The main objective of this work is to present trends of modern axle trucks. There are presented the latest famous brands axle trucks. For each type has its axle design, driving properties and applicability. Furthermore, this paper describes the basic principles and structure axle’s differentials, brakes, gearboxes and wheels in the wheels.
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New trends and material usage in bicycle frame design
Jelínek, Vladimír ; Němec, Karel (referee) ; Juliš, Martin (advisor)
Thesis in its first part summarizes the evolution of the bicycle from the draisine to the low wheels with a focus on the material of the frame of the bicycle. Also discussed in this section is an overview of small structural modifications, which were gradually used on a bike, like Bowden brake or the first type of transmission system. In the second part, the thesis describes the operating principles and types of suspension forks and disc brakes. Mentioned are materials that are currently used for bike frames with a focus on the advantages and disadvantages of each material used and its future anticipated use.
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