Active Control of Inlet Ducts

Investigation of Trapped Vorticity Concentrations Effected by Hybrid Actuation in an Offset Diffuser

“…Active flow control approaches that rely on distributions of normal and skewed jets emanating from the inner surfaces of the inlet duct can lead to significant improvement in the performance of offset diffusers with potential for rapid actuation and little drag penalty in the absence of actuation. AFC affords optimization and in-flight performance control both in the absence 12,13,14 and presence 15,16 of flow separation. Amitay et al 17 demonstrated active flow control of localized separation in internal flows in a two-dimensional S-duct using a synthetic jet control.…”

Simulation of Flow Control in a Serpentine Duct

“…10,19,34,35 Furthermore, many studies have been carried out to investigate the effectiveness of flow control in serpentine inlet ducts using both passive control techniques such as vortex generators, 3,5,6,18,22 as well as active flow control based on steady or unsteady blowing or suction such as vortex generator jets or tangential control jets. 4,26,[31][32][33] Recently similar types of techniques have been applied and studied both experimentally and numerically for boundary-layer-ingesting (S-duct) inlets. 1,2,11,12,20 In the current study, turbulence simulations are performed within an aggressive serpentine inlet duct by employing Streamline Upwind Petrov-Galerkin (SUPG) stabilized finite element formulation.…”