Simultaneous concentration and velocity field measurements in a shock-accelerated mixing layer |
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Authors: | Daniel Reese Jason Oakley Alonso Navarro-Nunez David Rothamer Chris Weber Riccardo Bonazza |
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Affiliation: | 1. Department of Engineering Physics, University of Wisconsin—Madison, Madison, WI, 53706, USA 2. Department of Mechanical Engineering, University of Wisconsin—Madison, Madison, WI, 53706, USA 3. Lawrence Livermore National Laboratory, Livermore, CA, 94550, USA
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Abstract: | A novel technique to obtain simultaneous velocity and concentration measurements is applied to the Richtmyer–Meshkov instability. After acceleration by a Mach 2.2 shock wave, the interface between the two gases develops into a turbulent mixing layer. A time-separated pair of acetone planar laser-induced fluorescence images are processed to yield concentration and, through application of the Advection-Corrected Correlation Image Velocimetry technique, velocity fields. This is the first application of this technique to shock-accelerated flows. We show that when applied to numerical simulations, this technique reproduces the velocity field to a similar quality as particle image velocimetry. When applied to the turbulent mixing layer of the experiments, information about the Reynolds number and anisotropy of the flow is obtained. |
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