Abstract
Simulation of a 24° compression ramp have been performed with a k — ε model. Additional terms to take into account compressibility effects (compressible dissipation, pressure-dilatation correlation) have been introduced in the kinetic energy equation. Wall functions and a low Reynolds model of Lam-Bremhorst are available to modelise the near wall region. Computations are first performed on a coarse mesh with the law functions model and different compressibility terms. The compressibility terms predict a larger recirculating buble than the standard k — ε model. Simulations are then performed on the prescribed fine grid with the Lam-Bremhorst model. The standard k — ε underpredicts the lenght of the recirculation bubble and the compressibility terms improve the results.
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© 1998 Friedr. Vieweg & Sohn Verlagsgesellschaft mbH, Braunschweig/Wiesbaden
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Le Ribault, C., Buffat, M. (1998). Numerical simulation of a 24° compression ramp by a k — ε model with compressibility terms. In: Dervieux, A., Braza, M., Dussauge, JP. (eds) Computation and Comparison of Efficient Turbulence Models for Aeronautics — European Research Project ETMA. Notes on Numerical Fluid Mechanics (NNFM), vol 5. Vieweg+Teubner Verlag, Wiesbaden. https://doi.org/10.1007/978-3-322-89859-3_39
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DOI: https://doi.org/10.1007/978-3-322-89859-3_39
Publisher Name: Vieweg+Teubner Verlag, Wiesbaden
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