Laminar separation bubble bursting in a surging stream
David Greenblatt, Hanns Müller-Vahl, Christoph Strangfeld
Abstract
We identified a new dynamic stall mechanism in surging flows on thick airfoils at low angles-of-attack. Counterintuitively, the laminar separation bubble bursts during early imposition of the favorable temporal pressure gradient, which rapidly drives the bubble aft, rendering it unable to reattach. We also introduced a new generalized pressure coefficient, without which the experimental data are impossible to interpret.
Topics & Concepts
Laminar flowBubbleStall (fluid mechanics)MechanicsAirfoilPressure gradientBurstingFlow separationRendering (computer graphics)Separation (statistics)GeologyPhysicsComputer scienceArtificial intelligenceBoundary layerNeuroscienceMachine learningBiologyFluid Dynamics and Turbulent FlowsBiomimetic flight and propulsion mechanismsComputational Fluid Dynamics and Aerodynamics