Acta Polytechnica. 2022, vol. 62
Recent Submissions
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Parametric study of the energy potential of a building’s envelope with integrated energy-active elements
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Building structures with integrated energy-active elements (BSIEAE) present a progressive alternative for building construction with multifunctional energy functions. The aim was to determine the energy potential of a ... -
Design and simulation of a bearing housing aerospace component from titanium alloy (Ti6Al4V) for additive manufacturing
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)In evaluating emerging technology, such as additive manufacturing, it is important to analyse the impact of the manufacturing process on efficiency in an objective and quantifiable manner. This study deals with the design ... -
Conversion of units of length from the Czech state standard to the geodetic baseline Javoriv
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Modern society cannot do without high quality geospatial data. This need constantly strengthens with the growth of the information society and the emerging cyber society. Validity and quality of geospatial data is strongly ... -
Stone Topography – Useful Tool in Monuments Restoration Process
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The surface of building stone on historic buildings often bears the original traces of craftsmanship processing. These are an integral part of the visual appearance of the monument and thus its value, which needs to be ... -
Application of strut-and-tie models for assessing RC half-joints not complying with current code specifications
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The work described is concerned with an investigation of the effectiveness of the use of strut-and-tie models for the structural assessment of half joints. Such elements form a part of many existing bridges which, although ... -
Recommended procedure for headroom design according to geometric parameters of building structures
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The system of Czech technical standards for geometric accuracy assumes that the designer determines the functional geometric parameters for a specific building. By calculation, he verifies them in the so-called “geometric ... -
Theoretical analysis of the influence of the chevron inclination angle on the thermal performance of a gasket plate heat exchanger
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Different models are applied for an experimental and theoretical determination of the thermal and hydraulic performance of gasket plate heat exchanger. One of the relevant aspects of recent works is the influence of the ... -
Study of surface roughness with MHD and couple stress fluid on porous curved annular plates
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The purpose of this article is to examine the effect of surface roughness on porous curved annular plates lubricated with couple stress fluid in the presence of magnetic field. The MHD-Stochastic Reynolds equation is derived ... -
A comparative study of ferrofluid lubrication on double-layer porous squeeze curved annular plates with slip velocity
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)This article makes an effort to present a comparative study on the performance of a Shliomis model-based ferrofluid (FF) lubrication of a porous squeeze film in curved annular plates taking slip velocity into account. The ... -
Performance of a hydromagnetic squeeze film on a rough circular step bearing: a comparision of different porous structures
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)This investigation deals with a comparative analysis of the impact of spongy structure based on the model of Kozeny-Carman and Irmay on a hydromagnetic squeeze film in a rough circular step bearing. Christensen and Tonder’s ... -
Analysis of output voltage ripple for dual randomized PWM buck converter operating in continuous and discontinuous conduction modes
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Dual Randomized Pulse Width Modulation (DRPWM) is renowned for its better effectiveness than Simple Randomized Pulse Width Modulation (SRPWM) in reducing conducted Electro-Magnetic Interferences (EMI) in power converters. ... -
CFD modelling of a secondary settling tanks: generalization based on database relations
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The modelling of a secondary settling tank area using numerical methods has been quite extensively explored and researched by numerous authors and papers. These developed models utilize different approaches, from efforts ... -
A model of isotope transport in the unsaturated zone, case study
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)This work deals with a groundwater flow and solute transport model in the near-surface (predominantly unsaturated) zone. The model is implemented so that it allows simulations of contamination transport from a source located ... -
Effect of pigments on bond strength between coloured concrete and steel reinforcement
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The effect of pigments on mechanical properties of coloured concrete intended for structural applications, including the bond stress-slip behaviour to embedded steel bars, is not well understood. Series of concrete mixtures ... -
Results of research on backlash compensation in a power electric drive by low-power electronic device
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)This article considers the feasibility of restoring and maintaining the kinematic accuracy of the support-rotary device drives by introducing a backlash compensation device into the control system. The power electromechanical ... -
Functional aerodynamics and its influence on the energy and thermal mode of a naturally ventilated double-skin transparent façade
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)This article deals with the dynamics of airflow through a cavity. In windless conditions, where a natural flow causes the flow of air in the cavity, the overall aerodynamic resistance of the cavity is the important aerodynamic ... -
Active disturbance rejection control-based anti-coupling method for conical magnetic bearings
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Conical-shape magnetic bearings are currently a potential candidate for various magnetic force-supported applications due to their unique geometric nature reducing the number of required active magnets. However, the bearing ... -
Low earth orbit nanosatellite: influence of heat dissipation on passive thermal analysis
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The use of small satellites in ambitious missions presents challenges related to thermal breakdowns as one of the critical issues contributing to their failure. Heat dissipation and thermal management are still the major ... -
Evaluation of residual strength of polymeric yarns subjected to previous impact loads
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The discovery of oil fields in deep and ultra-deep waters provided an opportunity to evaluate the use of synthetic ropes, complementarily or alternatively to traditional steel-based mooring lines in offshore units, mainly ... -
Experimental and simulation study of CO2 breakthrough curves in a fixed-bed adsorption process
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)This paper focuses on the laboratory experiments of low-temperature adsorption of CO2 at elevated pressure and on the validation of our mathematical model with the data obtained. The numerical approach uses fitting of ...
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