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National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Feastibility study and comparative study of air breathing electric propulsion systems operating in very low Earth orbit conditions
 Šťastný, Marek ; Dytrych, Tomáš ; Dániel, Vladimír ; Mrózek, Kryštof ; Obrusník, Adam
Air Breathing Electric Propulsion (ABEP) systems offer a promising solution to extending the lifetime of Very Low Earth Orbit (VLEO) missions by using residual atmospheric particles as a propellant. ABEP systems need to provide sufficient thrust to compensate for substantial aerodynamic drag present in VLEO environments. The feasibility of operating a hypothetical ABEP system of a given geometry at a given altitude is assessed via Direct Simulation Monte Carlo (DSMC) based on the following parameters: the mean pressure in the ionization chamber, compression factor and drag force acting upon the surface of the given geometry. Atmospheric models were used for reference to ensure realistic VLEO-like conditions. The comparative study is performed using a Global Plasma Model (GPM). A GPM can calculate the volume-averaged quantities of plasma systems with complex physics and reaction kinetics. The results of GPM are compared with a breadboard model of an Electron Cyclotron Resonance (ECR) ABEP system constructed by the Czech aerospace research institute (VZLU a.s.).
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Modely mechanického kmitání konstrukcí ze dřeva a na bázi dřeva
 Dániel, Vladimír
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2 Dániel, Vladimír
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