Study of Effects of Lightning Strikes to an Aircraft

Petrov, Nikolai I.; Haddad, Abderrahmane; Петрова, Г. Н.; Griffiths, Huw; Waters, R. T.

doi:10.5772/36634

Cited by 14 publications

(15 citation statements)

References 18 publications

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“…After investigating the validity and convergence of the fully coupled EM-thermal TLM model on a simple example we now apply the model to a simplified case of a diverter strip for lightning protection. Diverter strips are installed on places of high likelihood for lightning strike and are used for lightning protection on aircraft [34]. A diverter strip consists of an insulator layer on top of which conductive segments (square, diamond, circular) are placed and separated by short air gaps.…”

Section: Resultsmentioning

confidence: 99%

“…The cascade breakdown exhausts the electric field over a distance and limits the destructive capability of the EM field. The simplified (2D) diverter strips geometry studied is shown in Fig.17 and is adopted from [34], where the conductive segments are of square shape with a side length of 3.6mm, the gap between the segments is 0.36mm and the overall problem size is W=20.16mm and L=7.2mm. Using the similar setup in terms of excitation and boundary conditions as for the air gap model the plasma channel was successively formed between conductive segments and as presented in Fig.18.…”

Section: Resultsmentioning

confidence: 99%

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Coupled Electrothermal Two-Dimensional Model for Lightning Strike Prediction and Thermal Modeling Using the TLM Method

Elkalsh

Sewell

Benson

et al. 2017

IEEE J. Multiscale Multiphys. Comput. Tech.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Coupled Electrothermal Two-Dimensional Model for Lightning Strike Prediction and Thermal Modeling Using the TLM Method

Elkalsh

Sewell

Benson

et al. 2017

IEEE J. Multiscale Multiphys. Comput. Tech.

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“…The radome was equipped with a hybrid lightning protection system consisting of solid and segmented diverter strips. For the design of the lightning protection, the recommendations for electrically non-conducting aircraft structures were also considered [20][21][22][23][24]. To prove the effectiveness of the lightning interception, the full-scale radome was tested with the slow-rising high-voltage waveform D. Because the slow-varying double waveform D commonly covers the most critical case, this voltage waveform was selected in [25], although natural electric field pulses may have a concave waveform.…”

Section: Dielectric Strength Of a Sandwich Panel Structurementioning

confidence: 99%

Protection of Aircraft Radomes against Direct Lightning Strikes—An Overview

Klug

Heidler

Paul³

2021

Atmosphere

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The aim of this contribution is to design and test the lightning protection of an aircraft radome exposed to direct lightning strikes. The influencing parameters are investigated on different radome wall samples equipped with solid and segmented diverter strips. The effectiveness of the lightning interception and protection measures is tested with different high-voltage waveforms and representative high-current pulses. The tests show that reliable radome lightning protection can be achieved by an optimized arrangement of solid and segmented diverter strips, even if the aircraft radome has a huge size, with dimensions up to several meters.

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“…A thunderstorm with 2 flashes/min over a 10 km 2 surface means the chance of an airplane experiencing one of these flashes is once every 500 s it spends in that area. Additional information regarding dependence on different altitudes can be found in [102]. For space shuttles and satellite carrying rockets, protection before launch is assured by a multitude of lightning rods in place around the launching site.…”

Section: Direct Lightning Protection Measuresmentioning

confidence: 99%

“…Petrov et al [102] used the "attractive area" concept R a , which is based on the same idea as the Rolling Sphere Method (RSM), to determine the collection area around the plane. On the ground, the attractive area around an airplane-like structure for a lightning current of 100 kA is around 0.2 km 2 [102]. By using the Rolling Sphere Method the radius is:…”

Section: Direct Lightning Protection Measuresmentioning

confidence: 99%

Protection of electronics in composite structures against indirect lightning

Blaj¹

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SummaryDamage resulting from an interaction with lightning current in a military naval vessel, especially in a conflict zone and at the time of a conflict, which leads to the incapacitation of vital activities on the ship, is unacceptable. Because many potential conflict zones are in littoral areas, and because of the increase in lightning activity, both now and expected in the years to come, the provision of protection for naval vessels sailing in those waters should be a high priority. The fact that many standards exclude both naval vessels and the littoral area transforms this work into a potential contemporary solution.With the knowledge about the formation of charge layers in the atmosphere, and about the influence such weather phenomena as fog, clouds, and aerosols have on the transport of additional charge particles, it is possible to understand the formation of lightning. A review of the existing thunderstorm prediction models, and finding a way to verify and update the accuracy of such, is equally important at this stage. Merely understanding the root cause of the problem will not be enough to solve the problem, and therefore an extensive evaluation of the available literature, with a special attention to standards, also has to take place. Evaluating risks and finding what was previously accomplished by others, and any stones they have left unturned, can improve the life expectancy of a system or building block when applying and improving the existing technology. Conventional lightning protection measures serve as points of departure to reach the goals of this research. Such issues as positioning, zoning, and proximity to other components more attractive to lightning strikes must not be overlooked since these are equally important. The rolling sphere concept, as described in civil standards, is applied to naval vessels, and serves now as a basic tool within THALES to estimate the risk of lightning, and possible damage and/or interference. Steps taken by other branches of industry in this direction is investigated too. Investigation and a thorough analysis of other protective methods will help to generate the right ideas to tackle the issue and to improve lightning protection of electronics enclosed by composite structures against both direct contact with the lightning current, and the indirect effects of the associated electric and magnetic fields. Diverters are used by the aircraft industry and the possible use to protect radars under a composite non-conducting radome has been investigated experimentally. The constant increase in our dependency on composite panels throughout many branches of industry, including the naval and maritime sectors, make it necessary to quantify and measure all the risks associated with lightning strikes. Evaluating risks, and where necessary fixing them, will guarantee the successful use of this technology. The lack of shielding properties, and the high likelihood of deterioration and damage as a result of a lightning attachment, mean improvements are essential to make the u...

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Study of Effects of Lightning Strikes to an Aircraft

Cited by 14 publications

References 18 publications

Coupled Electrothermal Two-Dimensional Model for Lightning Strike Prediction and Thermal Modeling Using the TLM Method

Coupled Electrothermal Two-Dimensional Model for Lightning Strike Prediction and Thermal Modeling Using the TLM Method

Protection of Aircraft Radomes against Direct Lightning Strikes—An Overview

Protection of electronics in composite structures against indirect lightning

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