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A new, simple electrostatic-acoustic hybrid levitator
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Loeb, H. Lierke, E. G. Gross, D. |
| Copyright Year | 1990 |
| Description | Battelle has developed a hybrid levitator by combining the known single-axis acoustic standing wave levitator with a coaxial DC electric field. The resulting Coulomb forces on the charged liquid or solid sample support its weight and, together with the acoustic force, center the sample. Liquid samples with volumes approximately less than 100 micro-liters are deployed from a syringe reservoir into the acoustic pressure node. The sample is charged using a miniature high voltage power supply (approximately less than 20 kV) connected to the syringe needle. As the electric field, generated by a second miniature power supply, is increased, the acoustic intensity is reduced. The combination of both fields allows stable levitation of samples larger than either single technique could position on the ground. Decreasing the acoustic intensity reduces acoustic convection and sample deformation. Neither the electrostatic nor the acoustic field requires sample position sensing or active control. The levitator, now used for static and dynamic fluid physics investigations on the ground, can be easily modified for space operations. |
| File Size | 365158 |
| Page Count | 20 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19910012056 |
| Archival Resource Key | ark:/13960/t8gf5q90f |
| Language | English |
| Publisher Date | 1990-05-01 |
| Access Restriction | Open |
| Subject Keyword | Materials Processing Sound Waves Stability Deformation Fluid Dynamics Levitation Deployment Acoustics High Voltages Convection Sound Pressure Standing Waves Syringes Direct Current Space Processing Reservoirs Needles Miniaturization Active Control Electric Fields Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
