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Journal of Mechanical Science and Technology

, Volume 28, Issue 4, pp 1327–1337 | Cite as

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

  • Xiao Wang
  • Yonghua Yan
  • Zhengzhong Sun
  • Chaoqun LiuEmail author
Article

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.

Keywords

Implemented large eddy simulation Momentum deficit Numerical simulation Supersonic micro-ramp 

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Copyright information

© The Korean Society of Mechanical Engineers and Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Xiao Wang
    • 1
  • Yonghua Yan
    • 1
  • Zhengzhong Sun
    • 2
  • Chaoqun Liu
    • 1
    Email author
  1. 1.Math DepartmentUniversity of Texas at ArlingtonArlingtonUSA
  2. 2.Delft University of TechnologyDelftNetherlands

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