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Experimental and numerical study of flow structures of the second-mode instability

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Abstract

Flow structures of a Mach 6 transitional boundary layer over a 260 mm long flared cone are investigated by the particle image velocimetry (PIV). Particle images near the curved wall are initially transformed into surface-fitted orthogonal coordinates and spliced with their 180°-symmetric images to satisfy a no-slip condition at the wall. The results are then reversely transformed to the physical domain. Direct numerical simulation (DNS) is also performed to validate the experimental results. The experimental and numerical results are in agreement, indicating a strong dilatation process within the second-mode instability.

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Authors and Affiliations

  1. State Key Laboratory for Turbulence and Complex Systems, Peking University, Beijing, 100871, China

    Yiding Zhu

  2. Department of Aeronautics and Astronautics, College of Engineering, Peking University, Beijing, 100871, China

    Yiding Zhu

Authors
  1. Yiding Zhu
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Correspondence to Yiding Zhu.

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Project supported by the National Natural Science Foundation of China (Nos. 11602005, 10921202, and 11632002)

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Zhu, Y. Experimental and numerical study of flow structures of the second-mode instability. Appl. Math. Mech.-Engl. Ed. 40, 273–282 (2019). https://doi.org/10.1007/s10483-019-2430-9

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  • DOI: https://doi.org/10.1007/s10483-019-2430-9

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2010 Mathematics Subject Classification

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