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Summary of unconventional aircraft concepts
Nečas, David ; Šošovička, Róbert (referee) ; Lajza, Ondřej (advisor)
This bachelor´s thesis deals with civil aircrafts of unconventional conceptions, which got into serial production. The thesis will be divided according to categories of aircrafts, whereas in every category with the exception of large transport aircrafts one conventional and two unconventional aircrafts will be specified for comparing various properties. Military aircraft will be mentioned only marginally because of the representative of significant unconventional conception.
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Possibilities of minimalization of induced drag
Skarolek, Vilém ; Kouřil, Martin (referee) ; Lajza, Ondřej (advisor)
Lift-induced drag is a significant part of total drag of airplane during flight, thus its minimization is desirable for economical operation of air service. This bachelor thesis deals with possibilities of induced drag minimization. First part of this thesis presents basics of induced drag origin during flight. The second part of the thesis contains overview of potential methods of induced drag minimization, their description and structural design, including comparison of particular methods of drag minimization.
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Airplane Cooling System Optimization
Lajza, Ondřej ; Fiľakovský, Karol (referee) ; Horák, Aleš (referee) ; Píštěk, Antonín (advisor)
Dissertation thesis is focused on the aircraft cooling system optimization. The knowledge of the pressure loss is necessity for design of an optimal system. In the beginning of the thesis, the different designs of piston engine cooling systems are described for both aircrafts and automobiles. Other sections outline the determination of the coolers characteristics and describe the different test sections applicable for the characteristics measurement. The test section built at the Institute of the aerospace engineering is described as well. Practical part of the thesis describes the calibration of the test section. The measurements of the specific coolers were compared with the CFD simulation of two models - the simplified cooler model and cooler element model. Additionally, the measurements were compared with results obtained at specialized coolers testing facility.
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Design of aerodynamic wings of Formula Student / SAE
Fryšták, Lukáš ; Lajza, Ondřej (referee) ; Popela, Robert (advisor)
The objective of this thesis is design of aerodynamic wings for Formula Student/SAE car. Firstly, Formula Student is introduced and regulations concerning aerodynamic devices are discussed. Design of two-element inverted wing is described and this two dimensional airfoil section is analyzed in CFD. Forces acting on a moving vehicle are analyzed and effect of aerodynamic loads on vehicle dynamics is considered.
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Formula SAE aerodynamic optimization
Fryšták, Lukáš ; Lajza, Ondřej (referee) ; Popela, Robert (advisor)
Tato práce se zabývá měřením aerodynamických charakteristik modelu závodního vozu Formula SAE v aerodynamickém tunelu, v měřítku 1:4. V první části je představen projekt Formula SAE a popsána role aerodynamiky v rámci této soutěže. Následuje přehled teoretického pozadí, které je relevantní k provedenému experimentu. Ve druhé části práce je popsán samotný experiment a prezentovány jeho výsledky. Součástí je návrh, výroba a kalibrace šestikomponentní tenzometrické váhy pro měření aerodynamického zatížení. Testy v aerodynamickém tunelu byly provedeny ve čtyřech konfiguracích, aby bylo možné určit vliv přítlačných křídel a podlahy s difuzorem na výsledné aerodynamické charakteristiky vozu.
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Airplane Cooling System Optimization
Lajza, Ondřej ; Fiľakovský, Karol (referee) ; Horák, Aleš (referee) ; Píštěk, Antonín (advisor)
Dissertation thesis is focused on the aircraft cooling system optimization. The knowledge of the pressure loss is necessity for design of an optimal system. In the beginning of the thesis, the different designs of piston engine cooling systems are described for both aircrafts and automobiles. Other sections outline the determination of the coolers characteristics and describe the different test sections applicable for the characteristics measurement. The test section built at the Institute of the aerospace engineering is described as well. Practical part of the thesis describes the calibration of the test section. The measurements of the specific coolers were compared with the CFD simulation of two models - the simplified cooler model and cooler element model. Additionally, the measurements were compared with results obtained at specialized coolers testing facility.
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