Force interaction of high pressure glow discharge with fluid flow for active separation control
- Computational Plasma Dynamics Laboratory, Mechanical Engineering, Kettering University, Flint, Michigan 48504 (United States)
Radio frequency based discharges at atmospheric pressures are the focus of increased interest in aerodynamics because of the wide range of potential applications including, specifically, actuation in flows at moderate speeds. Recent literature describing promising experimental observations, especially on separation control, has spurred efforts in the development of parallel theoretical modeling to lift limitations in the current understanding of the actuation mechanism. The present effort demonstrates higher fidelity first-principle models in a multidimensional finite-element framework to predict surface discharge-induced momentum exchange. The complete problem of a dielectric barrier discharge at high pressure with axially displaced electrodes is simulated in a self-consistent manner. Model predictions for charge densities, the electric field, and gas velocity distributions are shown to mimic trends reported in the experimental literature. Results show that a residual of electrons remains deposited on the dielectric surface downstream of the exposed powered electrode for the entire duration of the cycle and causes a net electric force in the direction from the electrode to the downstream surface. For the first time, results document the mitigation process of a separation bubble formed due to flow past a flat plate inclined at 12 degree sign angle of attack. This effort sets the basis for extending the formulation further to include polyphase power input in multidimensional settings, and to apply the simulation method to flows past common aerodynamic configurations.
- OSTI ID:
- 20782521
- Journal Information:
- Physics of Plasmas, Vol. 13, Issue 2; Other Information: DOI: 10.1063/1.2168404; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ACTUATORS
AERODYNAMICS
ATMOSPHERIC PRESSURE
CHARGE DENSITY
COMPUTERIZED SIMULATION
DIELECTRIC MATERIALS
DISTRIBUTION
ELECTRIC FIELDS
ELECTRODES
ELECTRONS
FINITE ELEMENT METHOD
FLUID FLOW
GLOW DISCHARGES
HIGH-FREQUENCY DISCHARGES
PLASMA
PLASMA SIMULATION
RADIOWAVE RADIATION