This paper describes the implementation of a novel technique called Background Oriented Schlieren that can produce quantitative visualization of density in a flow. This technique uses only a digital still camera, a structured background, and inverse tomographic algorithms which can extract two-dimensional slices from a three-dimensional flow. This has been applied to obtain the density field for an axisymmetric supersonic flow over a cone-cylinder model. Comparisons with cone tables show excellent agreement.
Experiments in Fluids – Springer Journals
Published: Apr 8, 2004
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