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Methods of reducing aerodynamic drag of automobiles
Šimbera, Michal ; Vančura, Jan (referee) ; Čavoj, Ondřej (advisor)
Thesis deals with description of passive and active methods of reducing automotive aerodynamic drag. Firstly is given theory of aerodynamics and its testing methods. Further, split by vehicle parts, passive aerodynamic components used in mass production and on research vehicles are described. Lastly, some components of active aerodynamic are given.
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Wind loads of building structures
Štěrba, Martin ; Kala, Jiří (referee) ; Hradil, Petr (advisor)
The bachelor thesis deals with the analysis of the effects of wind load on building structures. In the context of the work is solved the numerical modeling of flow around the solid cylindrical bodies at high Reynolds numbers. To the simulations has been used computational software ANSYS CFX. The outputs of the work are the values of Strouhal numbers and the values of drag and lift coefficient depending on the Reynolds number.
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Quantification of hydrodynamic load on overflowed bridge deck using 2D numerical simulation
Pavlíček, Michal ; Hrdlička, Libor (referee) ; Špano, Miroslav (advisor)
The diploma thesis is focused on a quantification of hydrodynamic load of overflowed bridge deck. Solution was pursued by using two–dimensional numerical simulation of open channel flow in vertical plane created in ANSYS 15.0 software (modules: Workbench, Design Modeler, Meshing, Fluent). Values of drag force, lift force, moment, drag coefficient, lift coefficient and moment coefficient is result of computation. Various types of bridge decks were tested in relation to the degree of inundation (inundation ratio) and flow velocity.The thesis provides comparison of numerical simulation with physical experimental testing and result published in accessible resources.
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Comparison of panel codes for aerodynamic analysis of airfoils
Bilčík, Adam ; Schoř, Pavel (referee) ; Popela, Robert (advisor)
Cieľom tejto práce bolo vytvorenie prehľadu v súčasnosti používaných implementácií panelových metód pre aerodynamické výpočty charakteristík 2D profilov. Základný popis princípu panelovej metódy, porovnanie jednotlivých implementácií a zhodnotenie ich možností (presnosť, aplikovateľnosť) na typické úlohy. V práci boli použité tri rôzne panelové programy: Xfoil, JavaFoil a XFLR5. Práca bola obohatená o meranie v aerodynamickom tuneli.
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Determination of hydrodynamic load acting on overflowed bridge deck using numerical simulations
Stoklas, Jan ; Picek,, Tomáš (referee) ; Špano, Miroslav (advisor)
The subjekt of this diploma thesis is a quantification of hydrodynamic load of the overflow bridge deck using numerical simulations. The simulation was performe for eight different discharges, which correspond to different degrees of inundation of the bridge deck using different turbulent models in Flow-3D software. The result of the calculation are the values of the hydrodynamic load– the horizontal force, the vertical force and the moment acting on the bridge deck. Furthermore, drag coefficient, lift coefficient and moment coefficient were quantified. Finally, the results of turbulent models were compared with each other and with result of physical experimental testing.
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Aerodynamic interaction of autonomous vehicles
Opátová, Alexandra ; Čavoj, Ondřej (referee) ; Vančura, Jan (advisor)
This thesis deals with CFD simulation of platooning vehicles and their aerodynamic characteristics, created in Star CCM+ software. The main focus is on their aerodynamic drag dependency on different spacing between vehicles which allowed to evaluate the most energy efficient distance for platoon of vehicles. Furthermore, the procedure how to calculate the fuel consumption is described for set of variables.
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Determination of hydrodynamic load acting on overflowed bridge deck using numerical simulations
Stoklas, Jan ; Picek,, Tomáš (referee) ; Špano, Miroslav (advisor)
The subjekt of this diploma thesis is a quantification of hydrodynamic load of the overflow bridge deck using numerical simulations. The simulation was performe for eight different discharges, which correspond to different degrees of inundation of the bridge deck using different turbulent models in Flow-3D software. The result of the calculation are the values of the hydrodynamic load– the horizontal force, the vertical force and the moment acting on the bridge deck. Furthermore, drag coefficient, lift coefficient and moment coefficient were quantified. Finally, the results of turbulent models were compared with each other and with result of physical experimental testing.
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Aerodynamic interaction of autonomous vehicles
Opátová, Alexandra ; Čavoj, Ondřej (referee) ; Vančura, Jan (advisor)
This thesis deals with CFD simulation of platooning vehicles and their aerodynamic characteristics, created in Star CCM+ software. The main focus is on their aerodynamic drag dependency on different spacing between vehicles which allowed to evaluate the most energy efficient distance for platoon of vehicles. Furthermore, the procedure how to calculate the fuel consumption is described for set of variables.
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|
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Methods of reducing aerodynamic drag of automobiles
Šimbera, Michal ; Vančura, Jan (referee) ; Čavoj, Ondřej (advisor)
Thesis deals with description of passive and active methods of reducing automotive aerodynamic drag. Firstly is given theory of aerodynamics and its testing methods. Further, split by vehicle parts, passive aerodynamic components used in mass production and on research vehicles are described. Lastly, some components of active aerodynamic are given.
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