초록 ▼

An apparatus comprises a surface that is configured to be exposed to a fluid stream and a cavity wall that forms at least a portion of a cavity. A first channel opening is formed in the surface, and a second channel opening is formed in the cavity wall. A channel extends from the first channel openi

An apparatus comprises a surface that is configured to be exposed to a fluid stream and a cavity wall that forms at least a portion of a cavity. A first channel opening is formed in the surface, and a second channel opening is formed in the cavity wall. A channel extends from the first channel opening in the cavity wall to the second channel opening in the surface.

대표청구항 ▼

1. A system, comprising: a surface configured to be exposed to a fluid stream, wherein a first channel opening is formed in the surface;a cavity wall that forms at least a portion of a cavity, wherein a second channel opening is formed in the cavity wall, wherein a channel extends from the second ch

1. A system, comprising: a surface configured to be exposed to a fluid stream, wherein a first channel opening is formed in the surface;a cavity wall that forms at least a portion of a cavity, wherein a second channel opening is formed in the cavity wall, wherein a channel extends from the second channel opening in the cavity wall to the first channel opening in the surface; anda plasma actuator disposed in the channel. 2. The system of claim 1, wherein the plasma actuator is among a plurality of plasma actuators disposed in the channel. 3. The system of claim 2, wherein at least one of the plurality of plasma actuators is configured to produce a first electrohydrodynamic (EHD) body force in a direction that is different from a second EHD body force that is produced by at least one other one of the plurality of plasma actuators. 4. The system of claim 1, wherein the plasma actuator is configured to be dynamically activated in response to a pressure differential between a first location proximate to the first channel opening and a second location proximate to the second channel opening. 5. The system of claim 1, wherein the plasma actuator is configured to be dynamically activated in response to a pressure level. 6. A method, comprising: exposing a surface to a fluid stream, wherein an opening of a cavity is formed in the surface, wherein a channel extends from a first channel opening formed in the surface to a second channel opening formed in a cavity wall that forms at least a portion of the cavity; andactivating a plasma actuator disposed in the channel to adjust a pressure differential associated with the channel. 7. The method of claim 6, wherein the plasma actuator is activated dynamically in response to the pressure differential. 8. The method of claim 6, wherein the plasma actuator is among a plurality of plasma actuators disposed in the channel. 9. The method of claim 8, further comprising: activating at least one of the plurality of plasma actuators to generate a first electrohydrodynamic (EHD) body force in a first direction; andactivating at least one of the plurality of plasma actuators to generate a second EHD body force in a second direction, wherein the second EHD body force is generated subsequent to the first EHD body force being generated. 10. The method of claim 6, further comprising measuring a plurality of pressure levels. 11. The method of claim 10, further comprising calculating the pressure differential using the plurality of pressure levels. 12. The method of claim 6, wherein exposing the surface to the fluid stream comprises flying an aircraft through air. 13. The method of claim 6, wherein exposing the surface to the fluid stream comprises causing a fluid to flow through a pipe. 14. An apparatus, comprising: a surface configured to be exposed to a fluid stream, wherein a first channel opening is formed in the surface;a cavity wall that forms at least a portion of a cavity, wherein a second channel opening is formed in the cavity wall;wherein a channel extends from the second channel opening in the cavity wall to the first channel opening in the surface; anda plasma actuator disposed in the channel. 15. The apparatus of claim 14, further comprising an additional plasma actuator disposed in the channel, wherein the plasma actuator is configured to produce a first electrohydrodynamic (EHD) body force in a first direction, and wherein the additional plasma actuator is configured to produce a second EHD body force in a second direction that is opposite of the first EHD body force. 16. The apparatus of claim 14, further comprising an edge member that is separate from at least a portion of the surface and at least a portion of the cavity wall. 17. The apparatus of claim 16, wherein the edge member comprises a triangular cross section. 18. The apparatus of claim 16, wherein the edge member comprises a curved exterior edge. 19. The apparatus of claim 14, wherein the surface comprises an aircraft skin.