Three-dimensional optical tomographic imaging of supersonic jets through inversion of phase data obtained through the transport-of-intensity equation.
We report experimental results of quantitative imaging in supersonic circular jets by using a monochromatic light probe. An expanding cone of light interrogates a three-dimensional volume of a supersonic steady-state flow from a circular jet. The distortion caused to the spherical wave by the presence of the jet is determined through our measuring normal intensity transport. A cone-beam tomographic algorithm is used to invert wave-front distortion to changes in refractive index introduced by the flow. The refractive index is converted into density whose cross sections reveal shock and other characteristics of the flow.
Department of Physics, Indian Institute of Science, Bangalore 560012, India. hemanth@physics.iisc.ernet.in
Thayyullathil
T
Hemanth
Langoju
L
Rajesh
Renganathan
R
Padmaram
R Mohan
RM
Vasu
Kanjirodan
K
Rajan
Lalit M
LM
Patnaik