Reconstruction of the density field using the Colored Background Oriented Schlieren Technique (CBOS) |
| |
Authors: | F SourgenF Leopold D Klatt |
| |
Institution: | French-German Research Institute of Saint-Louis (ISL), 5 rue du Général Cassagnou, 68300 Saint-Louis, France |
| |
Abstract: | In this paper the improved Background Oriented Schlieren technique called CBOS (Colored Background Oriented Schlieren) is described and used to reconstruct density fields of three-dimensional flows. The Background Oriented Schlieren technique (BOS) allows to measure the light deflection caused by density gradients in a compressible flow. For this purpose the local image displacements of the image of a background pattern observed through the flow is used. In order to increase the performance of the conventional Background Oriented Schlieren technique, the monochromatic background is replaced by a colored dot pattern. The different colors are treated separately using suitable correlation algorithms. Therefore, the accuracy and the spatial resolution can be increased. A tomographic reconstruction method is then used to reconstruct the density field in three-dimensional flows from CBOS measurements. |
| |
Keywords: | Compressible flow Reconstruction Schlieren technique Three-dimensional flow |
本文献已被 ScienceDirect 等数据库收录! |