Abstract
An experiment was conducted to demonstrate temporally and spatially resolved spectroscopic measurements of plasma-actuator thermal properties in the localized arc-filament plasma actuator (LAFPA). The plasma is induced in this device by the generation of a high voltage between the two electrodes; a rapid increase in the electric potential between the electrodes results in the breakdown of the air into the electric-arc plasma as current begins to flow across the gap. In the highest-resolution, temporally resolved experiments, the light emitted by a single LAFPA was imaged using fused silica plano-convex lenses onto the entrance slit of a custom 1.52 mf/12 Czerny-Turner spectrometer. Temperatures observed in the plasma vary significantly over the discharge with rotational temperatures increasing by approximately four times, and vibrational temperatures increasing by 50%. It was found that spatial variation within the plasma is likewise significant, with the emission from the anode being much stronger than that of the cathode or gap region.
Original language | English (US) |
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Pages (from-to) | 1802-1806 |
Number of pages | 5 |
Journal | AIAA journal |
Volume | 52 |
Issue number | 8 |
DOIs | |
State | Published - Aug 2014 |
ASJC Scopus subject areas
- Aerospace Engineering