A real time interferometry system for unsteady flow measurements

Author

Brock, N.J. ; Chandrasekhara, M.S. ; Carr, L.W.

Author_Institution

Aerometrics Inc., Sunnyvale, CA, USA

fYear

1991

fDate

27-31 Oct 1991

Firstpage

423

Lastpage

430

Abstract

A simple real-time interferometer system was developed for use in dynamic stall and other unsteady flow research at compressible flow speeds. A conventional schlieren system was modified to operate as a point diffraction interferometer. The implementation of this interferometer is discussed, and results of trials with different point diffractors are presented. The performance of the interferometer under various flow conditions was investigated. Results are presented which show the effects of the interferometer parameters such as pinhole size and pinhole-plate optical density on the performance of the system

Keywords

compressible flow; flow visualisation; light interferometers; light interferometry; schlieren systems; compressible flow; dynamic stall; pinhole size; pinhole-plate optical density; point diffraction interferometer; real time interferometry; schlieren system; unsteady flow measurements; Diffraction; Extraterrestrial measurements; Fluid dynamics; Fluid flow measurement; High speed optical techniques; Laboratories; NASA; Optical interferometry; Real time systems; Visualization;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation in Aerospace Simulation Facilities, 1991. ICIASF '91 Record., International Congress on

Conference_Location

Rockville, MD

Type

conf

DOI

10.1109/ICIASF.1991.186266

Filename

186266