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| Version | Summary | Created by | Modification | Content Size | Created at | Operation |
|---|---|---|---|---|---|---|
| 1 | Dean Liu | -- | 2158 | 2022-10-31 01:35:24 |
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An electrostatic fluid accelerator (EFA) is a device which pumps a fluid such as air without any moving parts. Instead of using rotating blades, as in a conventional propeller or in the turbine of an airbreathing jet engine, an EFA uses the Coulomb force from a high voltage electric field to accelerate electrically charged air molecules, a phenomenon studied in the academic discipline called electrohydrodynamics (EHD). Because air molecules are normally electrically neutral, not charged, the EFA has to create some charged molecules, or ions, first. Thus there are three basic steps in the fluid acceleration process: ionize air molecules, accelerate those charge carriers and, through ion-ion and ion-neutral collisions, push many more neutral molecules in a desired direction, and finally neutralize ions again to eliminate any net charge in the downstream flow. This principle is used for spacecraft propulsion in ion thrusters. The basic working principle has been understood for some time but only in recent years have seen developments in the design and manufacture of EFA devices that may allow them to find practical and economical applications, such as in micro-cooling of electronics components.
References
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- I.A. Krichtafovitch, V.L. Gorobets, S.V. Karpov, and A.V. Mamishev, “Electrostatic Fluid Accelerator and Air Purifier–The Second Wind,” Annual Meeting of the Electrostatics Society of America, Edmonton, Canada: 2005.
- I.A. Krichtafovitch, V.L. Gorobets, S.V. Karpov, and A.V. Mamishev, “Electrostatic Fluid Accelerator and Air Purifier–The Second Wind,” Annual Meeting of the Electrostatics Society of America, Edmonton, Canada: 2005.
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- I.A. Krichtafovitch, V.L. Gorobets, S.V. Karpov, and A.V. Mamishev, “Electrostatic Fluid Accelerator and Air Purifier–The Second Wind,” Annual Meeting of the Electrostatics Society of America, Edmonton, Canada: 2005.
