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Design of and F5F Race Model
Faltičko, Martin ; Bidlo, Michal (referee) ; Chudý, Peter (advisor)
This document aims to explore the possibilities for design optimizations of an aircraft model in a specific competition category. On the basis of simulation of the model described by the basic parameters the characteristics are evaluated. Then an appropriately chosen optimization algorithm refines the design. The evaluation takes into account several criteria including aerodynamics, stability and weight.
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Influence of Aerodynamics on Vehicle Handling Performance
Hejtmánek, Petr ; Kaplan, Zdeněk (referee) ; Dundálek, Radim (referee) ; Píštěk, Václav (advisor)
The main aim of this dissertation was to develop a computational tool capable of evaluating the influence of aerodynamics on the handling of a vehicle. The methodology it uses is based on the simulation of driving manoeuvres with a single-track model of a vehicle, which was composed with an emphasis on minimizing the amount of necessary input parameters. This simple model, which allows the assessment of the influence of aerodynamics on vehicle dynamic and static driveability, therefore doesn’t require large amount of input data, which makes the acquirement of relevant values easier. The computational model was validated by extensive measurements of two driving manoeuvres defined by ISO norms (step steer input and steady state cornering). As a consequence of unsatisfactory initial validation results, the differences between measurements and simulations were analysed, which led to gradual enhancements of the model with additional inputs to achieve better accuracy of simulations. The final part of the thesis deals with the comparison of influences of individual aerodynamic parameters on vehicle handling and the assessment of overall significance of aerodynamics compared to other factors which were taken into account (tires, mass properties, steering etc.). This thesis was realized in close cooperation with Škoda-Auto.
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Road Resistances of Vehicles
Prachař, Roman ; Dadák, Leo (referee) ; Rochla, Tomáš (advisor)
his thesis deals with the analysis of particular road resistances that affect the car. It describes their importance and factors that influence their size. This thesis defines steps that determine particular quantities that are necessary to assess road resistances. Describing, it qualifies transfer and sizes of driving force that is needed to overcome total road resistance, measuring methods of road range tests upon appropriation of road resistances and influence of road resistances on economy of traffic. Practical part discusses the plan and course of realized measuring of selected sample of cars. Final part deals with the evaluation of measured values of realized measuring.
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Aerodynamic analysis and optimization of TL-4000 aircraft
Trusík, Vojtěch ; Navrátil, Jan (referee) ; Popela, Robert (advisor)
This master´s thesis is focused on aerodynamic analysis of 3D configuration of aircraft TL – 4000 and designing shape modifications to improve flight performances. Modifications are focused on wing – fuselage junction and junction between tail units. In continuation are analyzed the shapes of air intakes to cooling engine. Based on aerodynamic analysis of aircraft TL – 4000 are chosen convenient positions for pitot-static tube and inlets for ventilation of cabin.
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Analysis of the influence of body position on the car's aerodynamic characteristics
Daniel, Petr ; Blaťák, Ondřej (referee) ; Vančura, Jan (advisor)
Master’s thesis deals with the aerodynamics of racing vehicle for various settings of clearance and tilt of body. First is described the theory of aerodynamics and flow. It was necessary to build the CAD model of racing car for analysis. Assembly of this model is the next chapter of the master’s thesis. This is followed by CFD analysis, where is displayed a simplified model of the vehicle. This part describes the overall process and setting in the CFD program. In conclusion, the results are summarized for each setting.
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Experimental measurements of aerodynamic forces
Job, Štefan ; Vančura, Jan (referee) ; Porteš, Petr (advisor)
This thesis deals with the effect of the aerodynamic forces on a vehicle. It contains the description of the test run of the vehicle, the proposal on how to process the measurements, the processing of the measurements themselves, and the final assessment of the results as to their accuracy and the possibility of repeating the experiment. Furthermore, this thesis contains the comparison of the effect of the individual aerodynamic features on the race car.
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