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Energy and the Environment, 1998

ISBN 打印: 1-56700-127-0

3-DIMENSIONAL MODELING OF LASER REPETITIVE PULSE HEATING

Abstract

In the present study 3-dimensional laser heating of semi-infinite steel subjected to repetitive pulsation is considered. In modeling the process, an electron kinetic theory approach is employed and governing equations are derived. The numerical method employing an explicit scheme is introduced to solve the governing equations. The repetitive pulses are introduced such that the ratio of successive pulse intensity to the first pulse intensity is kept constant and the cooling period between two consecutive pulses is also kept constant. To investigate the power intensity ratio on the resulting temperature profiles, three ratios are considered separately. Moreover, the condition for the thermal integration is introduced. It is found that the temperature profiles do not follow the pulse profile and that thermal integration is possible for the low power intensity ratio considered in the present study.
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