AEM Seminar: Resonant mode control in compressible boundary layers over complex wall impedance
Carlo Scalo, Assistant Professor of Mechanical Engineering, Purdue University
2:30 PM on 2017-03-03
The talk will discuss fundamental computational and physical aspects associated with transitional and turbulent boundary layer control over porous walls. The dynamics of waves propagating in porous cavities will be analyzed via a novel inverse acoustic eigenvalue approach (Patel and Scalo, 2017) with focus on the characterization of the complex broadband surface impedance. Results from high-fidelity numerical simulations retaining full aeroacoustic coupling between the overlying flow and porous walls (Scalo et al, 2015-2016) relying on multi-oscillator time-domain impedance boundary conditions (Lin and Scalo, 2017) will be presented. An acoustics interpretation of the dynamics of second-mode instability waves in hypersonics boundary layers (Kuehl and Scalo, 2017) will be discussed. Finally, plans to perform direct numerical simulations of hypersonic transition delay over ultrasonically absorptive porous coatings will be presented in the context of a recently awarded AFOSR Grant.
Bio:
Dr. Carlo Scalo is an Assistant Professor in the School of Mechanical Engineering at Purdue University. He completed his postdoctoral appointment (2014) at the Center for Turbulence Research at Stanford University working on theoretical and numerical modeling of thermoacoustic devices and sound-turbulence interaction in compressible boundary layers. Prior to that, he obtained his Ph.D. (2012) from Queen's University, Canada, working on subgrid-scale modeling of high-Schmidt-number turbulent mass transfer in equilibrium and non-equilibrium geophysical flows. He obtained his B.Eng. (2006) and M.Sc. (2008) degrees in Aerospace Engineering at the Universita' degli Studi di Napoli -Federico II, Italy.
Scalo currently holds research contracts with AFOSR, NAVAIR, Ford Motor Company and Rolls Royce on topics including (but not limited) to thermo-acoustics, non-linear acoustics, numerical methods for acoustics in complex geometries, low- and high-speed turbulent boundary layers, turbulent mixing and heat-and-mass transfer, and subgrid-scale modeling of vortex dominated flows.