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Increasing the range of a vehicle with alternative propulsion
Dryml, Tomáš ; Ranuša, Matúš (referee) ; Navrátil, Václav (advisor)
The bachelor's thesis deals with increasing the range of a vehicle with an alternative drive, which is compressed air. First, an analysis of the pneumatic circuit is performed, from which the areas to be modified result. To improve, it is chosen to find a suitable working pressure and the correct filling, which is calculated on the basis of constant pressure filling and subsequent adiabatic gas expansion. From the theoretical calculation, the runs per cylinder stroke at different pressures are determined and the selected pressures are subsequently experimentally verified. The results show that the most suitable setting increased the range from 331 meters using the original setting, to 616 meters with the new setting.
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Optimization of hydrostatic bearing pad geometry using CFD simulation
Dryml, Tomáš ; Vimmr, Jan (referee) ; Michalec, Michal (advisor)
The master's thesis deals with the optimization of hydrostatic bearing pad geometry using CFD simulation and experimental measurements. By combining experimental and numerical approaches, the effect of variation of hydrostatic bearing recess shape and depth on individual operating parameters is investigated. The effect of geometry variations is determined by numerical simulations which have been validated with experimentally obtained data. The results show that the ideal recess depth should correspond to 20-50 times the lubrication layer height The simulations also show that depth variation has a significant effect on the operating parameters. In contrast, the variation of the recess shape does not significantly affect the operating parameters of the bearing. The design of the optimum geometry of the hydrostatic bearing is particularly important because it can bring significant financial and energy savings associated with the operation of (especially large-sized) hydrostatic bearings.
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Increasing the range of a vehicle with alternative propulsion
Dryml, Tomáš ; Ranuša, Matúš (referee) ; Navrátil, Václav (advisor)
The bachelor's thesis deals with increasing the range of a vehicle with an alternative drive, which is compressed air. First, an analysis of the pneumatic circuit is performed, from which the areas to be modified result. To improve, it is chosen to find a suitable working pressure and the correct filling, which is calculated on the basis of constant pressure filling and subsequent adiabatic gas expansion. From the theoretical calculation, the runs per cylinder stroke at different pressures are determined and the selected pressures are subsequently experimentally verified. The results show that the most suitable setting increased the range from 331 meters using the original setting, to 616 meters with the new setting.
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