Sökning: "Upward lightning initiation"
Visar resultat 1 - 5 av 6 avhandlingar innehållade orden Upward lightning initiation.
1. Experimental Observations and Theoretical Modeling of Lightning Interaction with Tall Objects
Sammanfattning : This thesis investigates various discharge processes associated with upward lightning initiated from tall objects, both experimentally and theoretically, trying to bridge the knowledge-gap in understanding the mechanisms of the phenomena.Upward lightning initiation has attracted a great deal of interest during recent years due to the proliferation of tall communication towers and wind turbines. LÄS MER
2. Some Properties of Lightning Flashes to a Tall Tower on a Mountain Top
Sammanfattning : .... LÄS MER
3. On the Attachment of Lightning Flashes to Grounded Structures
Sammanfattning : This thesis deals with the physical modeling of the initiation and propagation of upward positive leader discharges from grounded structures during lightning strikes. It includes the analysis of upward leaders initiated under the influence of the electric field produced by a dominant negative cloud charge and due to the combined action of a negative thundercloud and a descending downward stepped negative leader. LÄS MER
4. On the Attachment of Lightning Flashes to Wind Turbines
Sammanfattning : The work presented in this thesis aims at investigating the attachment of lightning flashes to wind turbines. Modern wind turbines are highly exposed to lightning strikes, due to the increase of their height and the rotation of the blades. Upward lightning is the dominant mechanism of lightning strikes to them. LÄS MER
5. On The Initiation of Upward Positive Leader Discharges During Lightning Strikes
Sammanfattning : .... LÄS MER