National Repository of Grey Literature 4 records found  Search took 0.01 seconds. 
Research Assistance to Improve Pulsating System
Foldyna, Josef ; Zeleňák, Michal ; Švehla, B.
The report presents the results of contract research for the company Dürr Ecoclean, aimed at improving the system using pulsating water jet. It was implemented and analyzed an extensive set of measurements with units 20 and 40 kHz and of recommendations for the next steps solutions.
Analysis of tourism intensity in Pootaví
ŠVEHLA, Bohuslav
This work analyzes tourism intensity in the region of "střední Pootaví". Methods of each analysis and steps of questionairy survey are the main part of that work. Results of those analysis and results of questionairy survey are used as a base for the suggestion of new tourist product - product of rural tourism.
Simulation of transmission of pressure pulsations in high-pressure system
Foldyna, Josef ; Říha, Zdeněk ; Sitek, Libor ; Švehla, B.
The paper presents results of numerical simulation of 3D, unsteady, turbulent flow of compressible water in a high-pressure system equipped with an acoustic generator. The generator vibrates at frequency of 20 kHz with amplitude of 6 µm. Acoustic waves (pressure pulsations), generated in water pressurized to 30 MPa and amplified by appropriately designed liquid waveguide, results in generation of very high velocity pulsations at the nozzle outlet. The influence of various geometrical configurations on acoustic wave propagation in the high-pressure system was simulated and results were verified by laboratory measurement of pressure pulsations upstream to the nozzle exit.

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2 ŠVEHLA, Bohuslav
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