On the laminar-turbulent transition in injection-driven porous chambers

This paper presents a characterization of the laminar-turbulent transition in a cold flow setup, representative of the flow in a solid rocket motor. Recent developments based on a linear stability analysis of this particular flow have highlighted the existence of intrinsic instabilities, generating the so-called parietal vortex shedding, responsible for thrust oscillations. From this essential ingredient, an original interpretation of the laminar-turbulent transition is proposed using three approaches. Eventually, a description of the laminar and turbulent areas is obtained for the entire flow, from which a transition line is defined.