Silicon Carbide Semiconductor Surface Dielectric Barrier Discharge (SSDBD) Device for Turbulent Skin Friction Drag Reduction and Flow Control

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$124,599.00
Award Year:
2013
Program:
SBIR
Phase:
Phase I
Contract:
NNX13CL28P
Agency Tracking Number:
125058
Solicitation Year:
2012
Solicitation Topic Code:
A3.04
Solicitation Number:
n/a
Small Business Information
Spectral Energies, LLC
OH, Dayton, OH, 45431-1262
Hubzone Owned:
N
Socially and Economically Disadvantaged:
Y
Woman Owned:
Y
Duns:
782766831
Principal Investigator:
Sivaram Gogineni
Principal Investigator
(937) 266-9570
sgogineni@spectralenergies.com
Business Contact:
Sivaram Gogineni
Business Official
(937) 266-9570
sgogineni@spectralenergies.com
Research Institution:
n/a
Abstract
The proposed research effort explores the use of a nanosecond pulse driven offset semiconducting surface dielectric barrier discharge (SSDBD) device for the control of high speed, near surface air flows and the reduction of skin friction drag. With the nanosecond discharge, very high field strengths are applied and then the field is turned off before glow-to-filamentary transition occurs. The semiconducting surface array suppresses the backward breakdown that has previously been shown to produce a cancelling backward jet leading to very little thrust for conventional nanosecond driven devices. The embedded semiconductors achieve this by conducting the backward current through the surface and thus eliminating the backward breakdown. This allows all the momentum produced in the forward direction to be delivered to the surrounding boundary layer flow field. Conventional sinusoidal driven Surface DBD's are capable of generating surface jets with velocities up to ~10 meter per second, limited by glow-to-filamentary transition of the discharge. The proposed SBIR work will explore the possibility of increasing the surface jet velocity by more than a factor of five. In addition, the SSDBD can be driven at a very high repetition rate, producing high repetition sequential surface jets and total thrust that are expected to be orders of magnitude higher than possible with conventional sinusoidal DBD configurations. These surface jets are expected to provide new methods for the control of boundary layer interactions including separation, transition to turbulence, and drag through the introduction of time varying momentum at selected locations close to the surface.

* information listed above is at the time of submission.

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