Národní úložiště šedé literatury Nalezeno 3 záznamů.  Hledání trvalo 0.01 vteřin. 
On the spatial development of a wall jet generated by DBD actuator
Procházka, Pavel P. ; Uruba, Václav
It will be presented a definition of wall jet created by plasma DBD actuator. Some aspects of this phenomenon will be shown on practical examples gained from experimental PIV measurements.
Preliminary experimental investigation of boundary layer in decelerating flow
Hladík, Ondřej ; Jonáš, Pavel ; Příhoda, Jaromír
Investigations of characteristics of turbulence inside boundary layer under decelerating flow were studied by means of constant temperature anemometer. The decelerating flow was simulated in the closed circuit wind tunnel 0.9 m × 0.5 m at IT AS CR. The free stream turbulence was either natural or risen up by square mesh plane grid. The details of experimental settings and measurement procedures of the instantaneous longitudinal velocity component are described and the distributions of intensity, skewness and kurtosis of turbulent fluctuations are discussed in the contribution.
Parametric study of vortex train generated by plasma actuator in dependency on input voltage waveform
Procházka, Pavel P. ; Uruba, Václav
This article is based on previous work of authors. The vortex train is created by a plasma DBD actuator after application of low-frequency amplitude modulation on high-frequency high-voltage carrier waveform. Data acquisition of flow field around actuators will be performed using time-resolved PIV measurement technique in plane parallel to flow and in cross-section. Phase-averaging will be used due to pseudo-periodical character of this process. The vortex behaviour dependency on modulation frequency, duty cycle, voltage value, electrode gap and other parameters will be shown. The generated flow patterns are to be applied for control of a boundary layer.

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