An experimental technique based on X-ray computed tomography (XCT) is used to characterize scalar mixing of a krypton jet with air at turbulent conditions. The high radiodensity of the krypton gas enables non-intrusive volumetric measurements of gas density and mixture composition based on spatial variations in X-ray attenuation. Comparisons of these measurements to both computational results from large-eddy simulations and data from previous experiments are presented, and the viability of this diagnostic technique is assessed. Important aspects of X-ray attenuation theory, XCT practice, and relevant error analysis are considered in data processing, and their impacts on the future development of this technique are discussed.
Experiments in Fluids – Springer Journals
Published: Sep 26, 2015
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