An electrostatically actuated valve for turbulent boundary layer control

Author

Frutos, J.R. ; Vernier, D. ; Bastien, F. ; de Labachelerie, M. ; Bailly, Y.

Author_Institution

Dept. LPMO, Inst. FEMTO-ST, Besangon

fYear

2005

fDate

Oct. 30 2005-Nov. 3 2005

Abstract

A large displacement electrostatic valve has been designed and realized for a realistic turbulent boundary layer control. This actuator consists of a pair of rigid electrodes and a flexible film having a S-shape providing local high electrostatic forces required for controling rather large pressure differences. The aim is the reattachment of the boundary layer near an aircraft flap trailing edge by transferring momentum energy via high speed pulsated micro air jets. The valve controls the frequency and the speed of the micro jets. An array of fifteen actuators has been manufactured and characterized by particles images velocimetry (PIV) and hot wire anemometry (HWA). The devices are able to control pressure differences up to 27 kPa with a supply voltage of 400 V. For this maximum pressure, the corresponding jet velocity downstream a 45 degree skew micro orifice (0.4 mm diameter) is close to 100 ms^-1

Keywords

boundary layer turbulence; electrostatic actuators; flow control; jets; orifices (mechanical); valves; 0.4 mm; 27 kPa; 400 V; aircraft flap trailing edge; displacement electrostatic valve; electrostatic actuator; electrostatic forces; flexible film; hot wire anemometry; micro air jets; micro orifice; particles images velocimetry; rigid electrodes; turbulent boundary layer control; Aircraft manufacture; Displacement control; Electrodes; Electrostatic actuators; Force control; Frequency; Manufacturing; Pressure control; Valves; Wire;

fLanguage

English

Publisher

ieee

Conference_Titel

Sensors, 2005 IEEE

Conference_Location

Irvine, CA

Print_ISBN

0-7803-9056-3

Type

conf

DOI

10.1109/ICSENS.2005.1597642

Filename

1597642