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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2403.18064 |
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| _version_ | 1866929291139219456 |
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| author | Tang, Anthony Aliseda, Alberto Mamishev, Alexander Novosselov, Igor |
| author_facet | Tang, Anthony Aliseda, Alberto Mamishev, Alexander Novosselov, Igor |
| contents | Time-dependent multiphysics interactions that drive the energy transfer in electromechanical systems are poorly understood. We probe dielectric barrier discharge (DBD) with an external DC-augmented (DCA) field to reveal new mechanistic insights. The biased HV DC electrode influences the interaction between the charged ions and the E-field, surface and space charge, and neutral molecules. Direct force measurement, velocity profiles, and time-resolved electrical and optical measurements of discharge characteristics provide evidence of complex plasma/flow interactions. Negative DCA leads to modest improvements in momentum transfer due to the field-augmented ion acceleration before the system transitions to sliding discharge and a counter jet at the DCA electrode, canceling the gains from positive ion acceleration. Positive DCA monotonically increases the wall-parallel force. A new oscillating residual charge interaction mechanism is identified to explain a greater than 2-fold increase in horizontal thrust, in which the acceleration of positive ions is augmented by the attraction from the residual (negative) charge. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_18064 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | DC-Augmented Dielectric Barrier Discharge (DCA-DBD) Tang, Anthony Aliseda, Alberto Mamishev, Alexander Novosselov, Igor Plasma Physics Time-dependent multiphysics interactions that drive the energy transfer in electromechanical systems are poorly understood. We probe dielectric barrier discharge (DBD) with an external DC-augmented (DCA) field to reveal new mechanistic insights. The biased HV DC electrode influences the interaction between the charged ions and the E-field, surface and space charge, and neutral molecules. Direct force measurement, velocity profiles, and time-resolved electrical and optical measurements of discharge characteristics provide evidence of complex plasma/flow interactions. Negative DCA leads to modest improvements in momentum transfer due to the field-augmented ion acceleration before the system transitions to sliding discharge and a counter jet at the DCA electrode, canceling the gains from positive ion acceleration. Positive DCA monotonically increases the wall-parallel force. A new oscillating residual charge interaction mechanism is identified to explain a greater than 2-fold increase in horizontal thrust, in which the acceleration of positive ions is augmented by the attraction from the residual (negative) charge. |
| title | DC-Augmented Dielectric Barrier Discharge (DCA-DBD) |
| topic | Plasma Physics |
| url | https://arxiv.org/abs/2403.18064 |