Quantitative Supersonic Flow Visualization Using Optical Tomography
Rajesh Langoju, EPFL LIB

Meeting • 30 October 2003 • EPFL, BM.4.235

Abstract
It is an experimental report of quantitative imaging in supersonic circular jets using a monochromatic light probe. An expanding cone beam of light interrogates a three dimensional volume of supersonic steady state flow from circular jet. The distortion caused to the spherical wave by presence of the jet is determined through special phase measuring techniques. A cone beam algorithm is used to invert wavefront distortion to changes in refractive index introduced by the flow. The refractive index is converted into density whose cross-sections reveal shock and other characters of the flow.