Abstract
Recently, much attention has been devoted to the nanosecond pulsed dielectric barrier discharge (ns-DBD) plasma actuators as they demonstrated superior control feature at higher speed regimes as compared to the alternating current (AC) DBD actuators. This type of actuator usually has similar configurations as the AC-DBD device, but is driven by high-voltage repetitive pulses with voltage of up to 50kVs and rise time from a few to tens of nanoseconds. It has been generally agreed that the main control mechanism of the ns-DBD plasma actuator is through Joule heating, causing steep gradients in pressure and temperature inside the heated gas volume. As a result, moving shock waves are generated and interact with the external flow. While previous studies have focused on the effectiveness of the actuators on specific applications, how the generated shock waves influence and interact with the external flow has not been thoroughly investigated. Therefore, this paper is to address this issue through studying the suppression of the separated flow over a ramp with nanosecond pulsed plasma actuators in a wind tunnel using smoke-wire visualization, Schlieren imaging technique and particle imaging velocimetry (PIV).
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Cui, Y.D., Zhao, Z.J., Li, J., Zheng, J.G., Khoo, B.C. (2017). Flow Separation Control Over a Ramp with Nanosecond-Pulsed Plasma Actuators. In: Ben-Dor, G., Sadot, O., Igra, O. (eds) 30th International Symposium on Shock Waves 2. Springer, Cham. https://doi.org/10.1007/978-3-319-44866-4_70
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DOI: https://doi.org/10.1007/978-3-319-44866-4_70
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