An experimental study on the flow pattern dynamics in a standard mixing vessel with radial baffles filled with water and induced by a pitched blade impeller pumping downward is presented. Investigation is mainly focused on detection and analysis of quasi-periodical or periodical low-fre...

The flow around roughened circular cylinders and the wake behind them were studied in a wind tunnel flow using the Particle Image Velocimetry (PIV) method. The Reynolds number ranged from 5140 to 11800, and the real diameter of the cylinders including surface roughness ranged ...

Research on water flow in a pump inlet sump is presented. The main effort has been devoted to the study of the vortical structures’ appearance and their behavior. The study was conducted in a dedicated model of the pump sump consisting of a rectangular tank 1272 ×&#x...

Flow in a branched channel is studied experimentally using the PIV technique. The presented study is concentrated on clarifying the dynamical behaviour in individual branches. The 11 branches issuing from the main channel perpendicularl...

Low pressure turbine blades are the most erosion-exposed moving parts of the steam turbine. This article brings a detailed overview of an innovative system applying a stellite coating to the leading edge of the steam turbine blades using the robotic laser cladding technology. The&#...

Water exhibits numerous anomalies. To explain the anomalies, various scenarios have been suggested. In accordance with the scenarios, progressive increase of surface tension with decreasing temperature is expected. But obvious experimental evidence of the second inflection point (SIP) anomaly was ...

For the temperature dependence of the surface tension of water, the equation formulated as early as 1976 by The International Association for the Properties of Water and Steam (IAPWS) is the most commonly used. There are reasons for a major revision of the equation. In th...

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...

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&...

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...

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...

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...

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.&...

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...

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...

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...

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⋅...

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...

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...

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&...