Time-correlated force production measurements of the dielectric barrier discharge plasma aerodynamic actuator

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Department of Physics, United States Air Force Academy, CO 80840, United States ^{[1
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来源：

Journal of Applied Physics | 2008年 / 103卷 / 07期

关键词：

An atmospheric-pressure dielectric barrier discharge (DBD) plasma; operated as a surface-mode discharge with a single encapsulated electrode and an asymmetric electrode alignment; is known to couple momentum into the surrounding neutral fluid and through this coupling has shown considerable promise as an aerodynamic flow control device. Several different models; often with conflicting explanations; have been offered to explain the process of this momentum coupling. The DBD is known to proceed in two stages during the discharge cycle; one on the positive-going portion of the applied ac high-voltage waveform and the other on the negative-going portion. By using the actuator to drive a second-order mechanical system; we show here that the great majority (97%) of the momentum coupling occurs during the negative-going portion of the discharge cycle and we relate this behavior to dramatic differences in the structure of the discharge revealed with high-speed photography. This information is critical in evaluating descriptions of the momentum-coupling processes in the plasma. © 2008 U.S. Government;

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Journal article (JA)

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