National Repository of Grey Literature 8 records found  Search took 0.00 seconds. 
Experimental aeroelastic investigation of models with one- and two degrees of freedom
Vlček, Václav ; Luxa, Martin
Two models for aeroelastic experiments were realized and partly tested. Models have one- and two-degrees of freedom, elastic properties of these models are changeable. It is possible to carry out simultaneous optical measurements of the flow field and dynamic measurements.
Steady and unsteady flow over a profile in a channel
Honzátko, R. ; Horáček, Jaromír ; Kozel, K.
The work deals with numerical solution of 2D inviscid incompressible flow over the profile NACA 0012 in a channel. The finite volume method in a form of cell-centered scheme at quadrilateral mesh is used. Governing system of equations is the system of Euler equations. Numerical results achieved at H-mesh and C-mesh are compared. The work presents computation of the steady states of the flow and also unsteady flow influenced by the prescribed oscillating behaviour of the profile.
Numerical investigation of flow phenomena in radial-flow pump at low NPSH value
Sedlář, M. ; Maršík, František ; Šafařík, Pavel ; Zima, Patrik
Cavitating flow in the impeller of a single-stage radial-flow pump at optimal flow rate and different values of NPSH (Net Positive Suction Head) is analyzed numerically using the VOF model of CFX-TASCflow. The size and the shape of the cavitation regions near NPSH3 agree well with the cavitation visualization inside the impeller at similar flow conditions.
Application of hot-film technique in analysis of transitional boundary layers
Jonáš, Pavel ; Wysocky, M. ; Elsner, W. ; Mazur, Oton ; Uruba, Václav
Wall-hot-film measuring technique is applied on the flat-plate boundary layer transition detection.
A note on the effect of the thermal conduction from a wall-hot-film sensor into the wall
Wysocky, M. ; Elsner, W. ; Jonáš, Pavel ; Mazur, Oton ; Uruba, Václav
Influence of the wall properties in hot-film measurement of transitional boundary layers is analyzed.
Synthetic jets
Uruba, Václav
Review of physics of synthetic jets and theirs application in a flow control is given
Some remarks to the flow in radial inflow turbine cascades of very low aspect ratio
Dvořák, Rudolf
Paper completes previous papers of the same author in suggesting methods of calculating secondary flow losses. It also suggests modification of the Reynolds number enabling correlation of data in low aspect ratio turbine cascades
Optimizatiom of curved diffuser with inner cylindrical wall
Sládek, A. ; Hyhlík, T. ; Příhoda, Jaromír
The aim of the paper is optimization of curved diffusers with rectangular cross-section. The optimization is based on numerical solution of Navier-Stokes equations with standard k-eps turbulence model using FLUENT 6.0 software. The inner wall is cylindrical and the outer wall is described by the Bezier spline curve with two parameters. Energy losses coefficient is very dependent on the radius of the inner wall. The minimum of energy losses was achieved for the ratio Ri/d= 2,25.

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