Žilinská univerzita v Žiline

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    Inovácia sústav tubínového motora Safír 5 – palivová a mazacia sústava
    (University of Žilina, 2025) Plochová, Jana; Čerňan, Jozef
    The thesis focuses on the innovation of the fuel and lubrication systems of the Safír 5 turbine engine, which was used as an auxiliary power unit (APU) as a compressed air generator in the L-39 Albatros aircraft. The main objective of the thesis is to analyse the technical possibilities of modifying this engine to change its original purpose, ensure smooth power regulation, simplify start-up, and increase its reliability. The theoretical part provides a detailed analysis of the operation of turbine engines, the principles of the fuel and lubrication systems of the Safír 5 engine, and their importance for the engine's smooth operation. In the practical part, technical modifications of the fuel and lubrication systems are proposed and implemented, including the construction of a new stand, the design of a fuel tank, and the electrical wiring. The functionality of the modified engine was subsequently verified through a series of tests. The result of the work is a functional and reliable Safír 5 engine with improved parameters, which can serve as a teaching aid or as a basis for further experiments.
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    Výpočet a optimalizácia venca lopatiek plynovej turbíny experimentálneho motora
    (University of Žilina, 2024) Martincová, Alexandra; Čerňan, Jozef
    The thesis deals with the calculation and optimization of the stage of the gas turbine distributor vanes of an experimental engine. The aim is to create an experimental turboshaft engine by combination of the Saphir 5 auxiliary power unit and a free gas turbine with a gearbox, derived from the TS-21 turbine starter. Through calculations, it is necessary to determine the optimal geometric parameters and the resulting number of stator vanes in order to design a 3D model of the gas turbine stator shroud as a connecting element between the Saphir 5 and the free gas turbine, which consists only of the rotor blades. The results of the work and the evaluation consists of calculations of the thermodynamic circulation of Saphir 5 and calculations of gas turbines. It also contains the design of the stator ring of a free gas turbine, as an intermediate member or flange of two aggregates creating an experimental engine. The 3D model and optimization is created using the Creo 7.0 program, which are based on the calculation of the gas turbine itself. In the end, we will get to the answers and to the summary of the results that created the exact design of the experimental engine.