National Repository of Grey Literature 5 records found  Search took 0.00 seconds. 
Numerická simulace syntetizovaného proudu v klidném vzduchu
Trávníček, Zdeněk ; Hyhlík, Tomáš ; Maršík, František
The paper deals with the numerical solution of a synthetic jet flow discharging into quiescent air. The aim of the work is to contribute to the understanding of flow physics associated with zero net mass transfer control device and particularly to show the influence of the turbulence model on the CFD solution.
Přestup tepla a hmoty u syntetizovaného impaktního proudu
Trávníček, Zdeněk ; Hyhlík, Tomáš ; Maršík, František
A zero–net–mass–flux actuator was used to generate a synthetic air jet. The local mass transfer in the jet impingement configuration was investigated using the naphthalene sublimation method. Based on the heat/mass transfer analogy, the mass transfer data have been converted to the corresponding heat transfer data. The results have been compared with the data for continuous impinging jets; the difference is less than 11%.
Vliv bočních stěn na dvorozměrný impaktní proud
Knob, M. ; Šafařík, P. ; Uruba, Václav ; Adamec, J.
The work deals with the influence of the side walls on both the fluid mechanical and the heat transfer characteristics of a two- dimensional impingigs jet.
Vícekriteriální návrh leteckých profilů pro kluzáky
Popelka, Lukáš ; Matějka, M. ; Nožička, J. ; Uruba, Václav
The article presents results of multicriteria aerodynamic design of airfoils suited for sailplanes. Airfoils for root and tip wing section as well as for empennage has been designed. Wind tunnel testing has proved the feasibility of such approach. The use of turbulators has been proposed on two older airfoils.
Numerické modelování složitých turbulentních proudění
Kozel, K. ; Louda, Petr ; Příhoda, Jaromír
The work deals with the numerical solution of turbulent impinging jet and round jet in a cross flow. The mathematical model is based on averaged Navier-Stokes equations closed by a turbulence model. Turbulence models used are a low-Reynolds-number eddy-viscosity model and/or an explicit algebraic Reynolds stress model. Numerical results are compared with experimental data. In case of impinging jet flow, the heat transfer is also solved.

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