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Published in:
2019 | OriginalPaper | Chapter
Experimental Study on a Single-Mode Interface Impacted by a Converging Shock
Authors : Juchun Ding, Zhigang Zhai, Ting Si, Xisheng Luo
Published in: 31st International Symposium on Shock Waves 1
Publisher: Springer International Publishing
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Abstract
Experiment of a single-mode air/SF6 interface impacted by a converging shock is performed in a semi-annular converging shock tube, and complete evolution of the shock propagation and the interface deformation is well captured by a high-speed schlieren photography. Time variation of the perturbation amplitude measured from schlieren pictures agrees well with the linear theory of Bell at early stages. Later, before secondary impact of the reflected shock, the growth rate decreases gradually even to be a negative, which is first discovered in experiment. Rayleigh-Taylor (RT) stabilization is found to be the main factor contributing to the growth rate reduction. A modification of Bell equation by introducing a decaying factor is proposed to reasonably evaluate the RT stabilization effect on the perturbation growth.