Turbulent flow separation over a wall-mounted hump model and its control using plasma actuators were studied numerically and experimentally. The hump model chosen in this study was that used in a 2004 NASA Langley CFD validation workshop for turbulent separation control using synthetic jets. The numerical simulations solved the Reynoldsaveraged Navier-Stokes equations using Fluent. Different tu...

The dielectric barrier discharge (DBD) plasma actuator that controls flow separation is one of the promising technologies to realize energy savings and noise reduction of fluid dynamic systems. However, the mechanism for controlling flow separation is not clearly defined, and this lack of knowledge prevents practical use of this technology. Therefore, large-scale computations for the study of t...

Experiments are performed using dry and humid air to ascertain the effect of humidity on the performance of a plasma actuator in flight conditions. These actuators are becoming popular in controlling flow about low to moderate speed aerospace vehicles. These experiments are performed at a new Test Facility of the Computational Plasma Dynamics Laboratory (CPDL) in Kettering University. A blow-do...

The present work is concerned with development of a new model for the momentum transfer due to plasmaactuator in aerodynamic flow-control applications. A comparative analysis of different volume-force estimation strategies is provided, focussing particularly on the phenomenological and experiment-based approaches. The main objective of the present study is a comprehensive evaluation of these mo...

Localized arc-filament plasma actuators, placed near the nozzle lip of a laboratory jet, have recently been demonstrated to have sufficient control authority to significantly excite the jet downstream M. Samimy et al., J. Fluid Mech. 578, 305 2007 . This class of plasma actuator, which in this application is recessed in a small cavity near the nozzle lip, causes intense local heating. This heat...

Glow discharge at atmospheric pressure using a dielectric barrier discharge can induce fluid flow, and operate as an actuator for flow control. In this paper, we simulate the physics of a 2-D asymmetric actuator operating in Helium gas using a high-fidelity first principles-based numerical modeling approach to help improve our understanding of the physical mechanisms associated with such actuat...