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Showing 1 to 16 of 16 for “"lightning strike"”.
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Aircraft charging using ion emission for lightning strike mitigation : an experimental study
Lighting strikes are a problem for aircraft flying in large external electric fields. In most cases, the strike is triggered by the aircraft; as it flies through an electric field, it becomes polarized, and on areas with small radius of curvature, the electric field is magnified. This can result in …
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Modeling gap dynamics, succession, and disturbance regimes of mangrove forests
… mangrove forest. In Can Gio, the suitability of lightning strike – caused gaps for setting a homogenous plantation into more natural-like state according to species composition and forest structure was analyzed. Finally, a theoretical simulation study was carried out to compare lightning strike …
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Simulation of haddad surge arrester model on a 132kV overhead transmission line for back flashover analysis using Alternative Transient Program (ATP)
Lightning is a major problem in a transmission line system. Lightning which occurs around the world will give a huge effect on electrical transmission system and also on distribution system division. Lightning-strike commonly generated in two different ways. One of the ways is direct strike to a …
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Molecular Dynamics Simulation Of Polymer Nanocomposites In Extreme Environments
… systems were investigated against lightning strike damage. It was inferred that the montmorillonite/graphene top coating has great potential to be used as a lightning strike damage protection measure for epoxy-based composite systems. A more thorough multi-physics (electrothermal) …
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Charging and discharging of Lichtenberg electrets
… high-voltage surges on power lines, to diagnose lightning strike victims, to analyze electrical breakdown of insulating materials, for artistic purposes, and for similar applications where pulsed capacitors are commonly used.</p>
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The effect of weather and climate change on the operation of meshed power networks
… outages on the GB transmission network were, Lightning, Snow, Sleet, Blizzards & Ice and Wind, Gales and Windborne Objects'. It also compared observational weather data to reanalysis data and lightning strike data and a lightning strike proxy to verify reanalysis data as a suitable replicator …
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Implementation of Microwave Transmissions for Rocket Exhaust Plume Diagnostics
… concentration of free electrons. The risk of a lightning strike in-flight is a function of both the conductivity of the body and its effective length. This paper presents an approach that relates the electron number density of the exhaust plume to its propagation constant. Estimated values of …
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Impulse ageing of polymeric materials
… by a switching surge or local fault while a lightning impulse is due to direct lightning strike to high voltage plant such as an overhead line. Both impulse events create travelling waves in the system, damaging insulation components and equipment. This work is concerned with the hypothesis …
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Development of Algorithms for Quantitative Analysis of Long Electrical Arcs in Crossflows
A single lightning strike can deliver a steady current of hundreds of amps during its attachment to an aircraft. Therefore, it is imperative to have an adequate lightning protection system in the aircraft to minimize the probability of catastrophic accidents. Current guidelines for lightning …
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Development of portable 10 stages Marx Generator
… placed in open air and they are often exposed to lightning strike as well as surge voltage. They are sustaining high surge voltage during the lightning phenomena. To achieve better protection of all such power equipments and quality power supply, these voltages should be simulated and test the …
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Tropical squall lines of the Arizona monsoon.
… afternoon. Satellite imagery, cloud-to-ground lightning strike data, and surface observations indicate the squall lines move from east to west or northeast to southwest by discrete propagation faster than all the winds below 20 kPa so that most of the anvil clouds lag behind. The synoptic-scale …
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Flash Flooding in Eastern Kentucky: An Analysis of the 3-4 August 2001 Event
… methods have been developed. For instance, lightning strike density helps forecasters in the West to locate regions more likely to receive the heavy rains necessary for flash flooding. Numerical forecasting models also help forecasters, especially when necessary data does not exist for the …
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Simulating artificial lightning and composite damage
Lightning occurs during extreme weather conditions and can interact with aircraft during flight. Since aircraft are increasingly made of electrically resistive composites, rather than conductive metals, it is important to analyse the damage caused by a strike. Literature has shown lightning can be …
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Multi-scale electrical and thermal properties of aligned multi-walled carbon nanotubes and their composites
… layers against electromagnetic (EM) waves and lightning strike, and tailored thermal conductivity is desired for heat management. Currently, effective use of CNTs is limited in macroscopic materials due to numerous issues including difficulties in processing; favorable CNT properties have not …
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Technology impact forecasting for multi-functional composites
Low technology readiness levels (TRL) technologies are attractive to the aerospace industry because their maturation cycles can happen simultaneously with the development lifecycle of the aircraft. However, due to the limited knowledge about a new technology in system evaluation, a low TRL …