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Analysis of Flow Oscillation Due to Sidewall of Three-Dimensional Supersonic Open Cavity Flow

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Abstract

Unsteady turbulent flow simulations were performed based on the Reynolds-averaged Navier–Stokes (RANS) equations to investigate flow oscillation due to three-dimensional (3D) configuration of a Mach 1.5 supersonic open cavity flow with a length-to-depth ratio of 3. Two-dimensional (2D) and 3D unsteady simulation results were analyzed and compared with experimental data and Rossiter’s empirical prediction data. The three-dimensional cavity width-to-depth ratio (W/D) was 1, 3.8 and 7.6. Computational results indicated that pressure oscillation in the 2D flow was generated by a single-flow structure, whereas a multiple-flow structure generated multiple oscillation peaks in the 3D flow. The flow structure in the 3D cavity was investigated. For the 2D flow case, the cavity internal pressure wave was directly synchronized with the free shear layer. In the 3D flow case, an unstable spanwise flow due to the sidewall was observed. This spanwise fluctuation produced additional pressure oscillations coupled with the streamwise internal pressure wave. The numerical results indicate that the spanwise flow reduces the propagation speed of the internal pressure waves and the intensity of the corresponding pressure fluctuation.

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Acknowledgements

This study was supported by the Agency for Defense Development (No. UD170084JD).

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Authors and Affiliations

  1. Department of Aerospace Information Engineering, Konkuk University, Seoul, Republic of Korea

    T. U. Kim & S. H. Park

  2. Department of Aerospace Engineering, Inha University, Incheon, Republic of Korea

    S. Lee

  3. Agency for Defense Development, Daejeon, Republic of Korea

    D. O. Yu & H. C. You

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  1. T. U. Kim
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  2. S. H. Park
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  3. S. Lee
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  4. D. O. Yu
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Correspondence to S. H. Park.

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Kim, T.U., Park, S.H., Lee, S. et al. Analysis of Flow Oscillation Due to Sidewall of Three-Dimensional Supersonic Open Cavity Flow. Int. J. Aeronaut. Space Sci. 20, 839–849 (2019). https://doi.org/10.1007/s42405-019-00174-5

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  • DOI: https://doi.org/10.1007/s42405-019-00174-5

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