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National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Optimized Five Hole Probe
 Skála, Vladislav ; Pick, P. ; Nožička, J.
This work deals with the design, construction and setting characteristics pětiotvorové probe to measure the direction and speed of air flow in the wind tunnel. The probe was optimized in the design. Set characteristics will be used in the evaluation of the speed measured by the probe.
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Influence of Carrying Frequency Phase Shift of Synthetic Jet Generator on The Noise
 Pick, P. ; Matějka, Milan ; Skála, V.
The main topic of this article is the influence of phase shift of neighbouring synthetic jet generators to the flow field past a hump and noise reduction. Syntheetic jet generators are placed in the hump in front of point of boundary layer separation. The carrying frequency of actuating signal, wich is driving the synthetic jet generator, is shifted for about 180°. The modulated frequency, which corresponds to the shading frequency of the flow, is superposed on the carrying signal. Finally, the benefits of phase shift signal of neighbouring synthetic jet generators are described, as far as the produced noise and the total loss coefficient decrease are concerned.
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