26 November 2001 Singularities of interferometric pictures in gas flow diagnostics
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It is developed a new approach to the study interferometric pictures properties at flow visualization. Interferometric fringes are defined as family of solutions a differential equation, which establishes slope of the fringes as function of light refraction vector components and of initial tuning two beam interferometer parameters. The approach allows both to systematize knowledge about pictures and to make prediction they behavior depend on properties to be investigated density flow field and initial tuning parameters. On base the qualitative theory differential equation it is realized possibility to study symmetry, smoothness of fringe, singularity points of the pictures. Early some of the proposed ideas were used for statement models of 2D-density flow field under analysis experimental interferometric pictures to reduce duration of the data processing. It is assumed an application for the choice 3D density field models under the same analysis in complex flow to be investigated with aid of digital interferometry. Such flows take place at diffraction of shock waves. The singularities are illustrated by means of interferometric picture examples, which was visualized under experimental study 2D and 3D gas flows.
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Igor Victorovic Ershov, Igor Victorovic Ershov, Yuriy D. Babichev, Yuriy D. Babichev, } "Singularities of interferometric pictures in gas flow diagnostics", Proc. SPIE 4448, Optical Diagnostics for Fluids, Solids, and Combustion, (26 November 2001); doi: 10.1117/12.449398; https://doi.org/10.1117/12.449398

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