1. Planar shock wave sliding over a water layer
- Author
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Jourdan, G., Marty, A., Allou, A., Rodriguez, V., Jourdan, ·, Marty, ·, Allou, ·, Parisse, J.-D., Institut universitaire des systèmes thermiques industriels (IUSTI), Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU), CEA-DEN Cadarache (CEA-DEN), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), and Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
Fluid Flow and Transfer Processes ,Shock wave ,020301 aerospace & aeronautics ,Materials science ,Shock (fluid dynamics) ,business.industry ,[SPI.FLUID]Engineering Sciences [physics]/Reactive fluid environment ,Computational Mechanics ,General Physics and Astronomy ,02 engineering and technology ,Mechanics ,Mach wave ,01 natural sciences ,Moving shock ,010305 fluids & plasmas ,Optics ,0203 mechanical engineering ,Mechanics of Materials ,Surface wave ,0103 physical sciences ,Oblique shock ,business ,Dispersion (water waves) ,Shock tube ,Physics::Atmospheric and Oceanic Physics - Abstract
In this work, we conduct experiments to study the interaction between a horizontal free water layer and a planar shock wave that is sliding over it. Experiments are performed at atmospheric pressure in a shock tube with a square cross section ( $$200\times 200\,\hbox {mm}^2$$ ) for depths of 10, 20, and 30 mm; a 1500-mm-long water layer; and two incident planar shock waves having Mach numbers of 1.11 and 1.43. We record the pressure histories and high-speed visualizations to study the flow patterns, surface waves, and spray layers behind the shock wave. We observe two different flow patterns with ripples formed at the air–water interface for the weaker shock wave and the dispersion of a droplet mist for the stronger shock wave. From the pressure signals, we extract the delay time between the arrival of the compression wave into water and the shock wave in air at the same location. We show that the delay time evolves with the distance traveled over the water layer, the depth of the water layer, and the Mach number of the shock wave.
- Published
- 2016
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