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Flight performance of the STOL light sport airplane
Koudelka, Jaroslav ; Sklenář, Filip (referee) ; Juračka, Jaroslav (advisor)
The aim of this bachelor thesis is to evaluate effect of individual parts of the selected aircraft on its aerodynamic characteristics and to summarize possible directions of aircraft modifications with taking into account increasing its cruising speed while maintaining STOL performances. The first part of this thesis is focused on the description of selected aircraft construction and its legislative categorization. Then follows the theoretical part describing the basic terms of horizontal flight mechanics, the creation of drag and drag types. The practical part contains the evaluation of the drag influence for individual aircraft parts, their possible directions of improving and the final summary how the modified parts influence flight performances. In conclusion they are results comparing the original aircraft configuration with the modified one with taking cruising speed into account. For the modified version there is an evaluation of its impact on the STOL performances.
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Aerodynamic properties of different front wing specifications on formula race car
Šulík, Daniel ; Zemanová, Lucie (referee) ; Štefan, David (advisor)
This bachelor’s thesis focuses on the aerodynamic properties of front wings on Formula 1 cars. The first chapter discusses the basic aerodynamic principles of fluids and gases. The second chapter discusses the historical evolution of front wings in Formula 1. Third chapter talks about the latest aerodynamic regulations and their benefits for the sport. In the last chapter there is a practical part with an air flow simulation on four different wings and their aerodynamic properties are compared.
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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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Truck aerodynamic parameters
Šilar, Josef ; Vančura, Jan (referee) ; Hejtmánek, Petr (advisor)
The main goal of this bachelor´s work is to depict and describe terms form the aerodynamics field in order to understand the problem of aerodynamics of the vehicles. Here is created overall view of constructive elements that lower aerodynamic resistance of vehicles and methods of survey of aerodynamic parameters. The work also contain the difference of mentioned parameters of suburban and truck cars.
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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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Manufacturing inaccuracies influence on an appearence of the additional moment on a sailboat rudder
Kazda, Adam ; Fic, Miloslav (referee) ; Štigler, Jaroslav (advisor)
This Master’s thesis is dedicated to a generation of an additional torque, which can occur due to the inaccuracy of the manufacturing. This issue is inspired by a real case from 2013. In this work CFD modeling is used to investigate three different sources of the additional torque: misalignment of the rudder, deviation of the propeller shaft and asymmetry of the rudder. A simplified 2D simulation is done for all three cases. This simulation is more suitable for a jet powered boat. Therefore the asymmetry of the rudder is investigated also in a 3D case, where the rotational component of the flow behind the propeller is included.
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