Vorticity transfer in a leading-edge vortex due to controlled spanwise bending
Kun Jia, Tyler Scofield, Mingjun Wei, Samik Bhattacharya
Abstract
The effect of dynamic spanwise bending on the vortex dynamics of an accelerating flat plate is studied with experiments and numerical simulations. A flat plate, held at an angle of attack of 30 degrees, is accelerated from rest to Reynolds number 2400. It was bent dynamically along the span in a controlled manner with a bending ratio of 0.65. We find that a dynamic spanwise bending induces a change in the effective shear layer velocity along the span's bent part and creates spanwise vorticity convection. As a result, the growth of circulation in the leading-edge-vortex gets delayed along the bent part, and the final circulation is smaller than the no bending case.
Topics & Concepts
Bent molecular geometryVorticityVortexCirculation (fluid dynamics)Leading edgeBendingMechanicsPhysicsReynolds numberMaterials scienceTurbulenceThermodynamicsComposite materialFluid Dynamics and Turbulent FlowsBiomimetic flight and propulsion mechanismsFluid Dynamics and Vibration Analysis