Development and implementation of an aerodynamic holographic interferometry system

Abstract

An aerodynamic holographic interferometry system has been developed and adapted for use with an existing supersonic wind tunnel. The basis for the system is briefly discussed, and the flow investigation for which the system was developed is outlined. The system is described, including detailed equipment schematics and cost figures. Some details and guidance are given with regard to experience in reducing the interferometry fringe data via the Abel transformation to obtain density fields and, in turn, velocity fields. Finally, representative results are shown together with complementary laser velocimetry measurements and Navier-Stokes computations.