An electrostatically driven surface for flexible wall drag reduction studies
Abstract
This paper describes the theoretical analysis, experimental development and surface motion data from an electrostatically driven flexible wall capable of producing high frequency, large amplitude, short wavelength standing wave motions. The driven wall was developed for use in studying flexible wall-turbulent boundary layer interactions. The theoretical analysis considers the coupled electrochemical system using a continuum model. For the system under consideration the electrical field is uncoupled from the mechanical system leading to a simplified analysis. The structural problem is a non-linear (moderately) large amplitude problem and details of the analysis are presented. Surface motion measurements, made using a modified schlieren type optical system, are discussed and details of the surface motion under different excitations are presented. Fair agreement is obtained between experimental measurements and theoretical calculations.
- Publication:
-
In: Drag reduction; International Conference
- Pub Date:
- 1977
- Bibcode:
- 1977drrd.conf....5W
- Keywords:
-
- Drag Reduction;
- Electrostatics;
- Flexible Bodies;
- Surface Reactions;
- Turbulent Boundary Layer;
- Wall Flow;
- Electric Fields;
- Mathematical Models;
- Membrane Structures;
- Perturbation Theory;
- Schlieren Photography;
- Standing Waves;
- Fluid Mechanics and Heat Transfer