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Electrohydrodynamic pool boiling in reduced gravity
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Stahl, S. L. Shaw, Benjamin D. |
| Copyright Year | 1996 |
| Description | This research is concerned with studying the effects of applied electric fields on pool boiling in a reduced-gravity environment. Experiments are conducted at the NASA Lewis 2.2 sec Drop tower using a drop rig constructed at UC Davis. In the experiments, a platinum wire is heated while immersed in saturated liquid refrigerants (FC-72 and FC-87), or water, causing vapor formation at the wire surface. Electric fields are applied between the wire surface and an outer screen electrode that surrounds the wire. Preliminary normal-gravity experiments with water have demonstrated that applied electric fields generated by the rig electronics can influence boiling characteristics. Reduced-gravity experiments will be performed in the summer of 1996. The experiments will provide fundamental data on electric field strengths required to disrupt film boiling (for various wire heat generation input rates) in reduced gravity for a cylindrical geometry. The experiments should also shed light on the roles of characteristic bubble generation times and charge relaxation times in determining the effects of electric fields on pool boiling. Normal-gravity comparison experiments will also be performed. |
| File Size | 419572 |
| Page Count | 6 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19970000393 |
| Archival Resource Key | ark:/13960/t0ht7k11b |
| Language | English |
| Publisher Date | 1996-09-01 |
| Access Restriction | Open |
| Subject Keyword | Materials Processing Phase Transformations Drop Towers Wire Field Strength Gravitational Effects Platinum Heating Surface Reactions Temperature Effects Nucleate Boiling Film Boiling Microgravity Heat Transfer Coefficients Electric Fields Heat Transfer Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
