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Collection's Items (Sorted by Submit Date in Descending order): 1 to 20 of 20
Duda, Daniel , Yanovych, Vitalii , Tsymbalyuk, Volodymyr , Uruba, Václav
Effect of Manufacturing Inaccuracies on the Wake Past Asymmetric Airfoil by PIV

The effect of manufacturing geometry deviations on the flow past a NACA 64(3)-618 asymmetric airfoil is studied. This airfoil is 3D printed according to the coordinates from a public database. An optical high-precision 3D scanner, GOM Atos, measures the difference from the idealized...

Yanovych, Vitalii , Duda, Daniel
Structural deformation of a running wind tunnel measured by optical scanning

Nowadays, the development of wind tunnels for the study of various aerodynamic phenomena is actively developing. It is possible to generate a highly laminar flow only under the condition of structural stability of the construction parts of the wind tunnel under the action of s...

Klimko, Marek , Lenhard, Richard , Žitek, Pavel , Kaduchová, Katarína
Experimental Evaluation of Axial Reaction Turbine Stage Bucket Losses

The article describes the measurement methods and data evaluation from a single-stage axial turbine with high reaction (50%). Four operating modes of the turbine were selected, in which the wake traversing behind nozzle and bucket with five-hole pneumatic probes took place. The article&...

Duda, Daniel , Uruba, Václav , Yanovych, Vitalii
Wake width: Discussion of several methods how to estimate it by using measured experimental data

Several methods of defining and estimating the width of a turbulent wake are presented and tested on the experimental data obtained in the wake past an asymmetric prismatic airfoil NACA 64(3)‐618, which is often used as tip profile of the wind turbines. Instantaneous velocities...

Duda, Daniel , Yanovych, Vitalii , Uruba, Václav , Žitek, Pavel , Milčák, Petr , Jelínek, Tomáš , Němec, Martin
Experimental investigation of the unsteady stator/rotor wake characteristics downstream of an axial air turbine

A feasibility study of velocity field measurements using the Particle Image Velocimetry (PIV) method in an axial air turbine model is presented. The wakes past the blades of the rotor wheel were observed using the PIV technique. Data acquisition was synchronized with the shaft ...

Švančara, Patrik , Duda, Daniel , Hrubcová, Petra , Rotter, Miloš , Skrbek, Ladislav , La Mantia, Marco , Durzoy, E , Diribarne, Pantxo , Rousset, Bernard , Bourgoin, Mickaél , Gibert, Mathieu
Ubiquity of particle-vortex interactions in turbulent counterflow of superfluid helium

Thermal counterflow of superfluid He is investigated experimentally, by employing the particle tracking velocimetry technique. A flat heater, located at the bottom of a vertical channel of square cross-section, is used to generate this unique type of thermally driven flow. Micronic solid...

Sláma, Václav , Mrózek, Lukáš , Tajč, Ladislav , Klimko, Marek , Žitek, Pavel
Flow analysis in a steam turbine control valve with through-flow valve chamber

A nuclear power plant also includes a secondary cycle, which main component is a steam turbine. The steam turbine processes the thermal and pressure energy of steam and converts it into mechanical energy. Reliable and safe operation of the steam turbine, thus of the entire...

Zdebor, Jan
Historie a současnost jaderného vzdělávání na Západočeské univerzitě v Plzni

The article briefly describes the history and present of nuclear education at the University of West Bohemia in Pilsen. The origins of nuclear education at the former University of Mechanical and Electrical Engineering are associated with the acquisition of nuclear technology in Škoda.&...

Pavlenko, Ivan , Liaposhchenko, Oleksandr , Ochowiak, Marek , Olszewski, Radoslaw , Demianenko, Maryna , Starynskyi, Oleksandr , Ivanov, Vitalii , Yanovych, Vitalii , Włodarczak, Sylwia , Doligalski, Michal
Three-dimensional mathematical model of the liquid film downflow on a vertical surface

Film downflow from captured liquid without wave formation and its destruction is one of the most important aspects in the development of separation equipment. Consequently, it is necessary to create well-organized liquid draining in areas of captured liquid. Thus, the proposed 3D mathem...

Duda, Daniel , Nerling, Frank , PANDA, Collaboration
Precision resonance energy scans with the PANDA experiment at FAIR: Sensitivity study for width and line shape measurements of the X(3872)

This paper summarises a comprehensive Monte Carlo simulation study for precision resonance energy scan measurements. Apart from the proof of principle for natural width and line shape measurements of very narrow resonances with PANDA, the achievable sensitivities are quantified for the concr...

Duda, Daniel , Yanovych, Vitalii , Uruba, Václav
An experimental study of turbulent mixing in channel flow past a grid

Grid turbulence is considered to be a canonical case of turbulent flow. In the presented paper, the flow structure is analyzed from the point of view of mixing properties, where vortical structures and their properties play a significant role. That is why the effect of va...

Yanovych, Vitalii , Duda, Daniel , Uruba, Václav
Structure turbulent flow behind a square cylinder with an angle of incidence

This article shows the results of a study of the structure of turbulent flow behind a square profile ALUTEC 45×45mm with T-slots. The angle of rotation of the profile relative to its axis varied α=0°, 15°, 30° and 45°. During the experiment, the flow velocity was 5m⋅...

Demianenko, Maryna , Volf, Michal , Pavenko, V. , Liaposhchenko, Oleksandr , Pavlenko, Ivan
The Solution of the Stationary Aeroelasticity Problem for a Separation Channel with Deformable Sinusoidal Walls

One of the most urgent problems concerning the design of inertial separation devices is the failure of the trapped liquid film from the contact surfaces due to the contact with the turbulent gas-liquid flow. For extension of the range of the effective inertial separation, a&#x...

Žitek, Pavel , Klimko, Marek
Experimentální vzduchová turbína VT-400.

The nuclear power plant also includes a secondary cycle. One of the main components of the cycle is a steam turbine. The flow through the flow path is very complicated and significantly affects the turbine efficiency. An single-stage axial experimental air turbine is located i...

Uruba, Václav , Procházka, Pavel , Skála, Vladislav
On the streamwise structures in the boundary layer under adverse pressure gradient on an inclined plate

The presented study is focused on experimental investigation of a boundary layer on a flat plate in adverse pressure gradient. The flat plate is placed in a regular flow, the pressure gradient is generated by the plate inclination. The preceding studies deal with structure of&...

Sedlář, Milan , Procházka, Pavel , Komárek, Martin , Uruba, Václav , Skála, Vladislav
Experimental Research and Numerical Analysis of Flow Phenomena in Discharge Object with Siphon

This article presents results of the experimental research and numerical simulations of the flow in a pumping system’s discharge object with the welded siphon. The laboratory simplified model was used in the study. Two stationary flow regimes characterized by di erent volume flow r...

Duda, Daniel , Uruba, Václav
Spatial spectrum from particle image velocimetry data

Sláma, Václav , Rudas, Bartoloměj , Eret, Petr , Tsymbalyuk, Volodymyr , Ira, Jiří , Macálka, Aleš , Pinelli, Lorenzo , Vanti, Federico , Arnone, Andrea , Lo Balbo, Antonio Alfio
Experimental and numerical study of controlled flutter testing in a linear turbine blade cascade

In this paper, experimental testing of flutter and numerical simulations using a commercial code ANSYS CFX and an in-house code TRAF are performed on an oscillating linear cascade of turbine blades installed in a subsonic test rig. Bending and torsional motions of the blades a...

Yun, Kukchol , Tajč, Ladislav , Kolovratník, Michal
A shape modification of the balancing slot of the impulse turbine stage with the drum rotor arrangement

At the previous conference in Český Krumlov it was presented how the balancing slots may influence the efficiency of the impulse turbine stage with the drum rotor arrangement. A few options for shape modification of the balancing slot were also suggested. Implementation of the ...

Klášterka, Hynek , Vimmr, Jan , Hajžman, Marek
Contribution to the gas flow and heat transfer modelling in microchannels

Collection's Items (Sorted by Submit Date in Descending order): 1 to 20 of 20