Thermal analysis of an arc-heater electrode with a rotating arc foot
| Autor: | Charles E. Shepard, Frank S. Milos |
|---|---|
| Rok vydání: | 1994 |
| Předmět: |
Fluid Flow and Transfer Processes
Materials science business.industry Mechanical Engineering Aerodynamic heating Aerospace Engineering Condensed Matter Physics Rotation Thermal diffusivity Arc (geometry) Plasma arc welding Optics Electrical resistance and conductance Space and Planetary Science Heat transfer Electrode business |
| Zdroj: | Journal of Thermophysics and Heat Transfer. 8:723-729 |
| ISSN: | 1533-6808 0887-8722 |
| DOI: | 10.2514/3.604 |
| Popis: | A smoothly rotating arc foot and an arc foot that jumps between multiple sticking points were analyzed using analytic formulations and numerical solution procedures. For each case the temperature distribution for a copper electrode was obtained for the plausible range of operating conditions. It is shown that the smoothly rotating arc foot is an extremely safe mode of operation, whereas the jumping arc foot produces excessively high electrode surface temperatures which are not greatly alleviated by increasing the average rotational frequency of the arc foot. It is suggested to eliminate arc-foot rotation and rely on the distribution of fixed electrodes with stationary arc attachment to avoid electrode failure at high current. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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