<title>Gas dynamic flow tomography using multidirectional speckle photography</title>

Abstract

The results of experimental investigation into the process of the local parameters reconstruction for three-dimensional flows from the data of doubleexposure speckle photographs, obtained simultaneously in different directions, are presented. A mathematical procedure of reconstruction, based on the integral Radon transform, is described and its accuracy is analyzed. On the basis of the mathematical simulation results, the requirements for the automated system of specklegram processing are formulated and realized. The examples of temperature and density fields in different objects, obtained by means of the above mentioned technique, are given. The error in obtained experimental data amounted to less than 5%, and the error in reconstructing the local temperature did not exceed 10%.