Modeling of Dielectric Barrier Discharge Plasma Actuator with Atmospheric Air Chemistry
Abstract
Surface discharge in air has been studied using chemistry of formation of different ion and neutral species of nitrogen and oxygen. Continuity equations governing densities of electrons, ions and neutral species of nitrogen and oxygen are solved with Poisson s equation to obtain spatial and temporal profiles of densities, and voltage. Results show that density profiles of charged species are nearly opposite to each other about the electrode set at positive and negative peaks of the cycle. Density profiles of nitrogen atom N and oxygen atom O are similar to each other at the same temporal location in a cycle because these do not respond to the electric field. Also N(+/2) and (O(+/2) respond to electric field in a similar manner, hence, their density profiles are similar to each other at same time instance. There is difference in the level of ionization of different species due to difference in rate coefficients. The motion of electrons and ions in response to electric field results in charge separation. The value of separated space charge shows footprints of electron deposition downstream of the overlap region of the electrodes resulting in formation of virtual negative electrode. The electrodynamic body force per unit volume has been predicted about the dielectric surface for the twentieth cycle. A time averaged force, predominantly downstream with a transverse component towards the wall, acts on the plasma in forward direction. This results in a moving wave of plasma over dielectric surface in the positive x-direction which can induce a control mechanism in the neighboring air flow.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 2006
- Accession Number
- ADA594410
Entities
People
- Datta V. Gaitonde
- K. P. Singh
- Subrata Roy
Organizations
- Kettering University