High speed flows inside cavities are encountered in many aerospace applications including
weapon bays of combat aircraft as well as landing gear. The flow field inside these cavities …

It has been known for quite some time that free shear layers are receptive to a specific range
of perturbation frequencies (a range where the shear layer will amplify a small perturbation) …

Flow control technologies have been used in the past century to control fluid flows. This text
presents the current state of the art in emerging modern flow control technologies and …

A new hybrid RANS-LES turbulence modeling approach suited for modeling cavity
aeroacoustics is presented. The model combines a one-equation LES subgrid model and a …

THE next generation of military aircraft, such as uninhabited combat air vehicles, has been
designed to avoid detection. To minimize the radar cross section, loads normally carried on …

The effects of small-scale dissipative fluidic actuation on the evolution of large-and small-
scale motions in a turbulent shear layer downstream of a backward-facing step are …

2 after HF forcing. The present work uses classical inviscid instability principles (Fjortoft's &
Reynolds Theorems) to demonstrate that the new HF modified mean flow profiles would be …

A numerical study is conducted to investigate fluidic control for transonic flow over an open
cavity. Numerical results are obtained for the unsteady threedimensional flow with different …

NASA Langley is aggressively investigating the potential advantages of active flow control
as opposed to more traditional aerodynamic techniques. Many of these techniques will be …

Abstract 1 Control of cavity noise and dynamic loading using a rod spoiler to provide passive
actuation is studied. Results from Hybrid RANS-LES simulations of this flowfield are …