The Corona Threshold for Coaxial Cylinders in Air at High Pressures
| Autor: | Myron Robinson |
|---|---|
| Rok vydání: | 1967 |
| Předmět: |
Materials science
business.industry General Engineering Electrical engineering Energy Engineering and Power Technology Radius Corona Cylinder (engine) law.invention law Electrode Corona ring Electrical and Electronic Engineering Current (fluid) Atomic physics business Order of magnitude Corona discharge |
| Zdroj: | IEEE Transactions on Power Apparatus and Systems. :185-189 |
| ISSN: | 0018-9510 |
| DOI: | 10.1109/tpas.1967.291834 |
| Popis: | The approximate corona-starting relation for concentric cylinders Ec/δ = A + B/√rδ, long established at lower gas densities, has been checked in air to δ = 35 over the respective ranges of inner and outer cylinder diameters of 0.0178 to 0.635 cm and 4.72 to 15.40 cm (Ec = corona-starting field at surface of inner electrode; r = radius of inner electrode; δ = gas density relative to atmospheric; A, B = constants). The formula holds for both polarities as long as 1) the critical density beyond which spark-over occurs without antecedent corona is not exceeded and 2) a modified definition of corona starting is used for the negative discharge. Some peculiarities of high-δ corona are noted, including the marked effect of polarity on the reproducibility of Ec data and, under certain conditions, the appearance below Ec of a current of the same order of magnitude as normal corona current. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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