Virtual Lunch & Learn: Dr. Caleb Barnes, Aeroelastic Effects on Transitional Airfoils

When:  Dec 11, 2020 from 12:00 to 13:00 (ET)
Associated with  Dayton/Cincinnati Section
**Please RSVP by Dec 4th on AIAA Engage. If you are unable to sign in to Engage, please send an RSVP e mail to tchoeger@earthlink.net Starting about a week before the event, the Zoom URL will be emailed to you and will be sent multiple times**

Abstract
This presentation addresses high fidelity implicit large eddy simulations of aeroelastic effects on airfoils operating in the transitional flow regime First, self sustained aeroelastic oscillations are explored in the low subsonic regime in which an elastically mounted airfoil operating at low to moderate Reynolds numbers exhibits pitch dominant oscillations sustained by an alternating pattern of laminar separation, turbulent reattachment and transient separation bubble The phenomenon is susceptible to gust disturbances and can be mitigated by briefly disrupting the characteristic flow patterns Second, potential for aeroelastic effects on a laminar airfoil in low transonic conditions at a higher Reynolds number is explored using small amplitude pitch oscillations Complex interaction between multiple shock structures, separation bubbles, and excursions of flow transition indicate potential for self sustained aeroelastic oscillations closely tied to transitional flow effects

Background
Dr. Caleb Barnes completed his Ph D at Wright State University in 2015 and is currently working as a Research Aerospace Engineer at the Air Force Research Laboratory in Dayton, Ohio His current research interests are in the areas of computational unsteady aerodynamics, high order implicit large eddy simulation, aeroelasticity, and fluid structure interactions His recent work has focused on the topics of flexible wing vortex interactions including formation flight and gust response In the past, he has contributed to the understanding of unsteady fluid dynamics on fluid structure interactions in biologically inspired configurations, flexible flapping wing maneuvers, and high order CFD methods.