Abstract

The computationally challenging case of an over-expanded nozzle flow involving shock induced boundary layer separation is examined in this paper. Comparative studies using a base line two-equation k − ω turbulence model with and without taking into account non-equilibrium effects are made. The additional equation (the lag equation) to model nonequilibrium effect for the eddy viscosity in the separated flow region, significantly improves predictions of shock induced separated flows in exhaust nozzle.

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