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National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
Force interaction of an airfoil in fluid flow
 Uruba, Václav
The physical mechanism of lift and drag forces exerted on an airfoil is studied using results from mathematical modelling. Special attention is paid to lift force origin. The mechanism based on 3D flow-structure as a result of 2D flow-field instability is described.
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Rotary slanted single wire CTA - a useful tool for 3D flows investigations
 Jonáš, Pavel
The procedure is described of experimental investigation of a statistically stationary generally nonisothermal 3D flow by means of a constant temperature anemometer (CTA) using single slanted heated wire, rotary round the fixed axis. The principle of this procedure is quite clear. The change of the heated wire temperature modifies ratio of CTA sensitivities to temperature and velocity fluctuations. Turning the heated wire through a proper angle changes the sensitivity to components of the instantaneous velocity vector. Some recommendations are presented based on long time experiences, e.g. on the choice of probe, on the probe calibration, to the measurement organization and to the evaluation of results.
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