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LES investigation into the generation of momentum deficits in the supersonic wake of a micro-ramp

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Abstract

Implicitly implemented large eddy simulation (LES) with a fifth-order WENO scheme was conducted in this study. Based on Navier-Stokes equations, this LES was carried out to explore the origin of momentum deficit caused by a supersonic micro-ramp at flow conditions of M a = 2.5 and Re θ = 5760. The numerical results were validated through qualitative and quantitative comparisons with existing experimental data. After describing the aerodynamic properties of the supersonic wake, such as the deficit and the streamwise vortices, the momentum deficit was later detected to originate from the lower portion of the upstream boundary layer, while the high momentum fluid originated from close to the wall at the upper portion. Position alternation trigged by the micro-ramp was finally proposed as a revised mechanism.

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Authors and Affiliations

  1. Math Department, University of Texas at Arlington, Arlington, USA

    Xiao Wang, Yonghua Yan & Chaoqun Liu

  2. Delft University of Technology, Delft, 2629HS, Netherlands

    Zhengzhong Sun

Authors
  1. Xiao Wang
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  2. Yonghua Yan
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  3. Zhengzhong Sun
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  4. Chaoqun Liu
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Corresponding author

Correspondence to Chaoqun Liu.

Additional information

Recommended by Associate Editor Donghyun You

Xiao Wang is a Ph.D. student at the Math Department of the University of Texas at Arlington, Texas, USA.

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Wang, X., Yan, Y., Sun, Z. et al. LES investigation into the generation of momentum deficits in the supersonic wake of a micro-ramp. J Mech Sci Technol 28, 1327–1337 (2014). https://doi.org/10.1007/s12206-013-1164-x

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  • DOI: https://doi.org/10.1007/s12206-013-1164-x

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