Löwe, Jens-Michael ; Hinrichsen, Volker (2019)
Experimental Investigation of the Influence of Electric Charge on the Behavior of Water Droplets in Electric Fields.
20th IEEE International Conference on Dielectric Liquids (ICDL). Rom, Italien (23.06.2019-27.06.2019)
doi: 10.1109/ICDL.2019.8796707
Konferenzveröffentlichung, Bibliographie
Kurzbeschreibung (Abstract)
High voltage insulators in electric power transmission and distribution must withstand extreme weather conditions like rain or snow without long-term degradation. One difficulty is the presence of water droplets residing on the hydrophobic silicone rubber surface of insulators, which locally alter the electric field and leads to ageing of the insulator's surface. The present contribution investigates the behavior of sessile water droplets exposed to strong electric fields with a highspeed camera. Electrically charged and uncharged droplets are generated under well-defined conditions and placed on a generic insulator model. The oscillation frequency of the droplet in resonance mode is investigated in detail with respect to the amount of charge, droplet volume, frequency of the electric field as well as the electric field strength. Significant changes in drop behavior are observed depending on the charge and the electric field strength. A regime map based on the experimental data as well as a mathematical model is developed to quantify the necessary conditions for the change of behavior. The performed experiments improve the understanding of droplets in elect fields as well as the ageing process of high voltage insulators.
| Typ des Eintrags: | Konferenzveröffentlichung |
|---|---|
| Erschienen: | 2019 |
| Autor(en): | Löwe, Jens-Michael ; Hinrichsen, Volker |
| Art des Eintrags: | Bibliographie |
| Titel: | Experimental Investigation of the Influence of Electric Charge on the Behavior of Water Droplets in Electric Fields |
| Sprache: | Englisch |
| Publikationsjahr: | 23 Juni 2019 |
| Ort: | Rom, Italien |
| Veranstaltungstitel: | 20th IEEE International Conference on Dielectric Liquids (ICDL) |
| Veranstaltungsort: | Rom, Italien |
| Veranstaltungsdatum: | 23.06.2019-27.06.2019 |
| DOI: | 10.1109/ICDL.2019.8796707 |
| URL / URN: | https://www.icdl2019.org/ |
| Kurzbeschreibung (Abstract): | High voltage insulators in electric power transmission and distribution must withstand extreme weather conditions like rain or snow without long-term degradation. One difficulty is the presence of water droplets residing on the hydrophobic silicone rubber surface of insulators, which locally alter the electric field and leads to ageing of the insulator's surface. The present contribution investigates the behavior of sessile water droplets exposed to strong electric fields with a highspeed camera. Electrically charged and uncharged droplets are generated under well-defined conditions and placed on a generic insulator model. The oscillation frequency of the droplet in resonance mode is investigated in detail with respect to the amount of charge, droplet volume, frequency of the electric field as well as the electric field strength. Significant changes in drop behavior are observed depending on the charge and the electric field strength. A regime map based on the experimental data as well as a mathematical model is developed to quantify the necessary conditions for the change of behavior. The performed experiments improve the understanding of droplets in elect fields as well as the ageing process of high voltage insulators. |
| Freie Schlagworte: | Terms—sessile droplet, electro-hydrodynamics, electric charge, composite insulator, droplet resonance, electric field, ageing |
| Fachbereich(e)/-gebiet(e): | 18 Fachbereich Elektrotechnik und Informationstechnik 18 Fachbereich Elektrotechnik und Informationstechnik > Institut für Elektrische Energiesysteme > Hochspannungstechnik 18 Fachbereich Elektrotechnik und Informationstechnik > Institut für Elektrische Energiesysteme DFG-Sonderforschungsbereiche (inkl. Transregio) DFG-Sonderforschungsbereiche (inkl. Transregio) > Transregios DFG-Sonderforschungsbereiche (inkl. Transregio) > Transregios > TRR 75 Tropfendynamische Prozesse unter extremen Umgebungsbedingungen |
| Hinterlegungsdatum: | 19 Aug 2019 08:34 |
| Letzte Änderung: | 03 Jul 2020 08:06 |
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