Computation of internal high-speed separated flow with modified B-L and J-K models

Y. Zhao, Z. M. Ding

Research output: Contribution to journalArticle

Abstract

The existence of shock-turbulent boundary layer interactions lead to very complicated flow phenomena and pose a challenge for numerical simulation. In this paper, two turbulence models, The Baldwin-Lomax (B-L) model and the Johnson-King (J-K) model, which were originally developed for simple external flow simulation, are modified to model complex high-speed internal separated flows. The full Navier-Stokes solver used in this paper is based on a cell-centered finite volume method and multistepping time marching scheme. Both implicit residual smoothing and local time stepping techniques are incorporated to accelerate the convergence rate. To ensure the numerical stability with the present explicit scheme, a point-implicit treatment to the source term in the ordinary differential equation (ODE) of the J-K model has been developed and has proved to be very effective in modeling such a complex flow. An arc-bump channel flow case has been studied. Comparisons of computed results with experimental data show that the present solver, with the modified turbulence models, predicts the shock and the flow separation very well. The J-K model is found to predict the size of the separation bubble with a higher accuracy.

Original languageEnglish
Pages (from-to)1053-1071
Number of pages19
JournalInternational Journal for Numerical Methods in Fluids
Volume28
Issue number7
DOIs
Publication statusPublished - Nov 15 1998

Keywords

  • Finite volume method
  • Flow separation
  • Internal flow
  • Shock-boundary layer interaction
  • Turbulence modeling

ASJC Scopus subject areas

  • Computational Mechanics
  • Mechanics of Materials
  • Mechanical Engineering
  • Computer Science Applications
  • Applied Mathematics

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