TY - GEN
T1 - Computation of transient-temperature profiles in objects exposed to simulated lightning currents
AU - Metwally, I. A.
AU - A-Rahim, A. A.
AU - Heidler, F.
AU - Zischank, W.
N1 - Funding Information:
The first author wishes to acknowledge his indebtedness to both the Alexander von Humboldt Foundation for its financial support and the University of the Federal Armed Forces, Munich, Germany for its generous hospitality.
PY - 2003
Y1 - 2003
N2 - This paper presents a theoretical analysis of transient temperature distribution in metals and composites struck by different lightning currents to simulate objects of interest, especially aircrafts. A computer program based on the finite volume technique is written to compute the transient-temperature distributions in three dimensions due to both high-amplitude impulse currents (IC) and the relatively low-amplitude long-duration currents (LDC). Typical waveform of the discharge current during lightning strikes to objects near/on ground (negative downward flash), at high altitudes (negative upward flash) and in-flight (e.g. aircrafts) are simulated with different amplitudes and durations. The simulation considers the IC as first negative, or superimposed or subsequent return strokes with respect to the LDC. Different types of metals and carbon-fiber composites are also investigated to compare their thermal transient responses. Finally, the theoretical results are verified by using a sophisticated high-speed infrared camera to measure the rear-face temperature profiles of metals as a function of the coordinates and time due to both IC and LDC.
AB - This paper presents a theoretical analysis of transient temperature distribution in metals and composites struck by different lightning currents to simulate objects of interest, especially aircrafts. A computer program based on the finite volume technique is written to compute the transient-temperature distributions in three dimensions due to both high-amplitude impulse currents (IC) and the relatively low-amplitude long-duration currents (LDC). Typical waveform of the discharge current during lightning strikes to objects near/on ground (negative downward flash), at high altitudes (negative upward flash) and in-flight (e.g. aircrafts) are simulated with different amplitudes and durations. The simulation considers the IC as first negative, or superimposed or subsequent return strokes with respect to the LDC. Different types of metals and carbon-fiber composites are also investigated to compare their thermal transient responses. Finally, the theoretical results are verified by using a sophisticated high-speed infrared camera to measure the rear-face temperature profiles of metals as a function of the coordinates and time due to both IC and LDC.
KW - Heating effect
KW - Lightning currents
KW - Metals
KW - Rear-face temperature
KW - Transient-temperature distribution
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U2 - 10.1109/PTC.2003.1304132
DO - 10.1109/PTC.2003.1304132
M3 - Conference contribution
AN - SCOPUS:84861522970
SN - 0780379675
SN - 9780780379671
T3 - 2003 IEEE Bologna PowerTech - Conference Proceedings
SP - 194
EP - 199
BT - 2003 IEEE Bologna PowerTech - Conference Proceedings
T2 - 2003 IEEE Bologna PowerTech Conference
Y2 - 23 June 2003 through 26 June 2003
ER -