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National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
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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Hot wire probe adapted to the skin friction measurement in the proximity of a rough wall
 Jonáš, Pavel ; Mazur, Oton
The paper deals with the problem of direct measurement oj the instantaneous skin friction in boundary layers on rough plain surfaces.
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