Modes of lightning attachment to aircraft at different stroke currents and relative positions of descending lightning leader

Das, S. Murali; Kumar, Udaya

doi:10.1109/apl57308.2023.10182199

Cited by 2 publications

(8 citation statements)

References 7 publications

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“…4) for 10, 30 and 50 kA anticipated return stroke currents of the downward progressing leader. In the same, the variation of the normalized potential difference between the airplane and the downward progressing leader tip In an earlier work [13], the lower limit of anticipated return stroke current below which attachments are mostly attributed to airplane-intercepted mode is determined. In the current study, a comparable analysis has been conducted to explore the influence of surface-mounted antennas on the critical stroke current.…”

Section: Resultsmentioning

confidence: 95%

“…electrically floating nature. Due to the presence of a downward progressing leader, the electric potential of the airplane becomes a significant fraction of the electric potential at the head of the downward progressing leader [13][14].…”

Section: Methodsmentioning

confidence: 99%

“…D represents the smallest distance between the airplane and the downward progressing leader tip.It's important to highlight that unlike grounded objects and electrodes present in the laboratories, the electric potential of an airplane (referred to as 𝑘𝑘 �� ) is not constant due to its electrically floating nature. Due to the presence of a downward progressing leader, the electric potential of the airplane becomes a significant fraction of the electric potential at the head of the downward progressing leader [13][14]. Consequently, in order to establish the attachment with the airplane, the 𝑘𝑘 �� in equation ( 1) needs to be recomputed for every step of progression of the downward electrical stepped leader.…”

Section: Methodsmentioning

confidence: 99%

“…In an earlier work [13], the lower limit of anticipated return stroke current below which attachments are mostly attributed to airplane-intercepted mode is determined.…”

Section: Methodsmentioning

confidence: 99%

“…e respective potentials of the leader head and the airplane. D represents the smallest ward progressing leader tip.It's important to highlight that unlike grounded objects and electric potential of an airplane (referred to as 𝑘𝑘 �� ) is not constant due to its ence of a downward progressing leader, the electric potential of the airplane becomes a at the head of the downward progressing leader [13][14]. tachment with the airplane, the 𝑘𝑘 �� in equation ( 1) needs to be recomputed for electrical stepped leader.…”

Section: And Ated By the Airplanementioning

confidence: 99%

See 4 more Smart Citations

Possibility of Lightning Strike to Surface-Mounted Antennas on Aircraft

Chowdhury,

Das,

Kumar

2024

Amrit Res. J.

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Lightning is considered a significant electromagnetic hazard for airplanes. One of the initial stages in developing lightning protection systems for airplane involves determining potential areas where lightning may strike and attach to the airplane. The most common mode of attachment to the airplane, known as the airplane-initiated mode, is caused by airplane-initiated bipolar leaders. Previous research has indicated that airplane components, such as the nosecone, wingtips, and stabilizer tips, play a crucial role in the commencement of connecting leaders. Apart from these, other extremities formed by the surfacemounted antennas are also present on the airplane. These antennas are typically 40-50 cm tall, providing sharp protrusions where significant field intensification can occur under the influence of the ambient field. Lightning attachment to the antenna subjects it to high rate of rise of current and large variation in local electric field. Moreover, the initial attachment can result in local intense heating and consequential damage. Therefore, it is crucial to investigate how these surface-mounted antennas are vulnerable to attachment compared to other airplane extremities. The current investigation aims to measure the likelihood of lightning striking antennas on airplane.

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Section: Resultsmentioning

confidence: 95%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…In an earlier work [13], the lower limit of anticipated return stroke current below which attachments are mostly attributed to airplane-intercepted mode is determined.…”

Section: Methodsmentioning

confidence: 99%

Section: And Ated By the Airplanementioning

confidence: 99%

See 3 more Smart Citations

Possibility of Lightning Strike to Surface-Mounted Antennas on Aircraft

Chowdhury,

Das,

Kumar

2024

Amrit Res. J.

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Numerical simulation of aircraft lightning attachment zone using the enclosing ball method

Ding,

Zhang,

Jiang

2024

International Journal of Applied Electromagnetics and Mechanics

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The initial stage in aircraft lightning protection design and safety certification involves delineating the lightning attachment zone. The lightning leader’s development is inherently random, favoring the shortest path to the aircraft fuselage. In response, we employ the enclosing ball method to establish the lightning attachment zone. First, define the center point of the aircraft as the coordinate position for the sphere’s center, creating a sphere with a specified radius. The leader’s initial position is then selected from any point on the sphere. Second, by calculating distances between the leader’s position and various areas on the aircraft surface, we determine the shortest path. The corresponding aircraft surface area along this path is identified as the lightning attachment zone for the leader. Subsequently, choose a new leading position on the sphere and iterate through the calculation process until all sphere positions are considered. Finally, tally the occurrence frequencies for all calculated attachment areas, representing the attachment probability of each area based on its frequency of occurrence. This paper not only compares our method with the electrostatic field simulation method but also contrasts it with the probability distribution of lightning attachment points obtained from aircraft flight experiments. The comparison results are highly favorable, providing robust verification for the correctness of our approach.

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Modes of lightning attachment to aircraft at different stroke currents and relative positions of descending lightning leader

Cited by 2 publications

References 7 publications

Possibility of Lightning Strike to Surface-Mounted Antennas on Aircraft

Possibility of Lightning Strike to Surface-Mounted Antennas on Aircraft

Numerical simulation of aircraft lightning attachment zone using the enclosing ball method

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