Browsing Energetický ústav by Issue Date
Now showing items 1-20 of 125
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Unsteadiness in Effervescent Sprays: a New Evaluation Method and the Influence of Operational Conditions
(Begell House, 2008-01-01)A new evaluation method of unsteadiness of the spray generated by an effervescent atomizer is presented. The method is based on measurements of pressure fluctuations in the atomizer mixing chamber. Measurements, made under ... -
Research of transport and deposition of aerosol in human airway replica
(EDP Sciences, 2010-11-24)Growing concern about knowledge of aerosol transport in human lungs is caused by great potential of use of inhaled pharmaceuticals. Second substantial motive for the research is an effort to minimize adverse effects of ... -
Study of cyclic and steady particle motion in a realistic human airway model using phase-Doppler anemometry
(EDP Sciences, 2010-11-24)Transport and deposition of particles in human airways has been of research interest for many years. Various experimental methods such as constant temperature anemometry, particle image velocimetry and laser-Doppler based ... -
The Fluid Flow in the T-Junction the Comparison of the Numerical Modelling and PIV Measurement
(Elsevier, 2011-09-05)There is presented the fluid flow in the T-junction with the 90 degree angle of the adjacent branch and with the 50mm diameter of each branch, in this chapter. The flow is organized as a combining flow. It means that there ... -
Spray Structure of a Pressure-Swirl Atomizer for Combustion Applications
(EDP Sciences, 2011-11-21)In the present work, global as well as spatially resolved parameters of a spray produced by a pressure-swirl atomizer are obtained. Small pressure-swirl atomizer for aircraft combustion chambers was run on a newly designed ... -
Numerical simulation of air flow in a model of lungs with mouth cavity
(EDP Sciences, 2011-11-22)The air flow in a realistic geometry of human lung extended of mouth cavity is simulated with computational flow dynamics approach as stationary inspiration. Geometry used for the simulation includes mouth cavity, larynx, ... -
Graphical expression of thermodynamic characteristics of absorption process in ammonia-water system
(EDP Sciences, 2011-11-22)The adiabatic sorption is very interesting phenomenon that occurs when vapor of refrigerant is in contact with unsaturated liquid absorbent refrigerant mixture and exchange of heat is forbid between the system and an ... -
Power Spectral Density of Velocity Fluctuations Estimated from Phase Doppler Data
(EDP Sciences, 2011-11-22)Laser Doppler Anemometry (LDA) and its modifications such as Phase-Doppler Particle Anemometry (P/DPA) is point-wise method for optical non-intrusive measurement of particle velocity with high data rate. Conversion of the ... -
Measurement of the velocity field behind the automotive vent
(EDP Sciences, 2011-11-22)Passenger comfort in a personal vehicle cabin strongly depends on the appropriate function of the cabin ventilation system. Great attention is therefore paid to the effective functioning of the automotive vents. Various ... -
Influence of the turbulence representation at the inlet on the downstream flow pattern in LES of backward-facing step
(EDP Sciences, 2012-04-09)The impact of the choice of inlet boundary condition treatment on the fluid flow is studied in this work. The correct representation of the turbulence at the inlet to the domain is essential for the accuracy of Large ... -
Introduction to liquid wall film atomization
(EDP Sciences, 2012-04-16)The objective of the article is an introduction to the theoretical study of atomization of droplets from the surface of a thin liquid film. The overview of basic principles of atomization prediction is complemented by the ... -
Calibration of the Heat Balance Model for Prediction of Car Climate
(EDP Sciences, 2012-04-16)In the paper, the authors refer to development a heat balance model to predict car climate and power heat load. Model is developed in Modelica language using Dymola as interpreter. It is a dynamical system, which describes ... -
Determination of needed parameters for measuring temperature fields in air by thermography
(EDP Sciences, 2012-04-16)The aim of this article is the parameters determination of equipment for measuring temperature fields in air using an infrared camera. This method is based on the visualization of temperature fields in an auxiliary material, ... -
Prediction of car cabin environment by means of 1D and 3D cabin model
(EDP Sciences, 2012-04-16)Thermal comfort and also reduction of energy requirements of air-conditioning system in vehicle cabins are currently very intensively investigated and up-to-date issues. The article deals with two approaches of modelling ... -
Heat Exchanger Leakage Problem Location
(EDP Sciences, 2012-04-16)This paper describes a procedure used to identify the leakage location inside the prime surface gas turbine rekuperators. For this purpose, an analytical model of the leaky gas turbine recuperator was created to assess its ... -
Comparison of CFD simulations and measurements of flow affected by coanda effect
(EDP Sciences, 2012-04-16)The article deals with experimental research and numerical simulations of specific phenomena in fluid flows called Coanda effect (CE), which has numerous important engineering applications. Although many researchers have ... -
Heat Transfer and Pressure Drop Measurement in Minichannels
(EDP Sciences, 2012-04-16)This paper describes the suitable techniques for the heat transfer and pressure drop measurement in smooth tubular channels with the internal diameter less than 5 mm. The first experimental data are mentioned and their ... -
Experimental measurement and numerical modeling of cavitating flow in converging-diverging nozzle
(EDP Sciences, 2012-04-16)Paper presents results of the experimental research and computational modeling aimed on cavitating vortical structures induced by swirling flow. An experimental circuit was built with swirl generator and converging-diverging ... -
Energy transformation and flow topology in an elbow draft tube
(University of West Bohemia, 2012-06-01)Paper presents a computational study of energy transformation in two geometrical configurations of Kaplan turbine elbow draft tube. Pressure recovery, hydraulic efficiency and loss coefficient are evaluated for a series ... -
Characteristics of Turbulent Particle Transport in Human Airways under Steady and Cyclic Flows
(Elsevier, 2012-06-15)Motion of monodispersed micron-sized particles suspended in air flow was studied on transparent model of human airways using Phase-Doppler Particle Analyser (P/DPA). Time-resolved velocity data for particles in size range ...