Bulletin of the American Physical Society
71st Annual Meeting of the APS Division of Fluid Dynamics
Volume 63, Number 13
Sunday–Tuesday, November 18–20, 2018; Atlanta, Georgia
Session E03: Shock Interactions and Focusing
5:10 PM–6:28 PM,
Sunday, November 18, 2018
Georgia World Congress Center Room: B204
Chair: Lian Duan, Missouri University of Science and Technology
Abstract ID: BAPS.2018.DFD.E03.1
Abstract: E03.00001 : Visualization of shock wave–grid turbulence interaction in the counter–driver shock tube*
5:10 PM–5:23 PM
We have developed a “counter-driver shock tube (CD-ST) in which we can generate two sets of a planar shock wave and a post-shock flow in the opposite directions. The initiations of a planar shock wave and a counter flow are done with sending electrical signals to the diaphragm opening devices on both ends with an appropriate time difference. The experiments were conducted using a newly-developed CD-ST with a total length of 10.1 m. Using side-view shadowgraph, we have successfully visualized shock wave deformation made by the grid turbulence. With a shock Mach number of 1.04 and a turbulent Mach number of 0.024, the side-viewed shock front became much dispersed with a sufficiently long interaction length than 0.3 m; the shock wave front became “wrinkled” and then “broken,” thereby claiming that we have successfully visualized the formation of “broken” shock wave as was suggested by the numerical simulation in Larsson et al. J. Fluid Mech. 717, 293 (2013).
*The authors gratefully acknowledge the kind donation of cellophane diaphragm by Futamura Chemical Co., Ltd. This research was supported by the Japan Society for Promotion of Science, Grants-in-Aid for Scientific Research (A), No. 18H03813 and Grant-in-Aid for JSPS Research Fellow, No. 17J10997.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.DFD.E03.1
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