URANS simulation of injection-driven flows with an imposed-transition model

Abstract : The influence of laminar-turbulent transition on injection-driven flows fluctuations is investigated. URANS simulations of the transitional flow are compared with a laminar simulation and a cold-flow experiment. The transition in the URANS simulations is imposed using an intermittency function based on experimental observations by Gazanion et al. The simulations evidence a strong influence of the transition on the flow fluctuations. In particular, the amplification of PVS modes is reduced in the transition region, and the vortical structures are damped. The influence of the parameters of the transition model in these phenomena is detailed. It is also showed that using the transition model can improve the relevance with the experiment
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B. Gazanion, F. Chedevergne, G. Casalis. URANS simulation of injection-driven flows with an imposed-transition model. Space Propulsion 2014, May 2014, COLOGNE, Germany. ⟨hal-01069576⟩

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