Accession Number:

ADA591900

Title:

Study of Control Parameters for Separation Mitigation Using an Asymmetric Single Dielectric Barrier Plasma Actuator

Descriptive Note:

Journal article

Corporate Author:

KETTERING UNIV FLINT MI

Report Date:

2006-01-01

Pagination or Media Count:

10.0

Abstract:

Separation mitigation using asymmetric dielectric barrier discharges is studied by considering the neutral gas flow past a flat plate at an angle of attack. A self-consistent plasma actuator model is employed to couple the electric force field to the momentum of the neutral gas. The equations governing the motion of electrons, ions and neutrals are solved with Poissons equation to study effective control of flow separation. The impact of select parameters such as amplitude of the excitation, dielectric constants the initial ionization level and the electrode shape is elucidated. It is found that the dielectric surface just downstream of the exposed electrode becomes negatively charged during part of the cycle for the chosen work parameters and a time averaged force acts on the plasma predominantly downstream with a transverse component towards the wall. The momentum of the plasma couples to neutral gas through collisions, which results in the enhancement of near-wall momentum yielding a wall-jet feature that effectively eliminates the separation bubble.

Subject Categories:

  • Operations Research
  • Machinery and Tools
  • Structural Engineering and Building Technology
  • Electricity and Magnetism
  • Plasma Physics and Magnetohydrodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE