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首页> 外文会议>7th Biennial Conference on Engineering Systems Design and Analysis 2004(ESDA 2004) vol.1: Advanced Energy Systems; Advanced Heat Transfer in Engineering Systems; ... >TWO DIMENSIONAL TRANSIENT ANALYSIS OF TEMPERATURE DISTRIBUTION IN A SOLID IRRADIATED BY A GAUSSIAN LASER SOURCE
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TWO DIMENSIONAL TRANSIENT ANALYSIS OF TEMPERATURE DISTRIBUTION IN A SOLID IRRADIATED BY A GAUSSIAN LASER SOURCE

机译：高斯激光源辐照的固体中温度分布的二维瞬态分析。

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摘要

The use of localized heat source, such as lasers and electron beams, in many manufacturing processes has received a lot of attention in last years. This is due to their versatility and to the possibility to concentrate high powers over small areas. In this paper the transient two dimensional thermal field in a solid irradiated by a moving Gaussian laser beam has been numerically analyzed. The numerical simulation allows for both surface heat losses, convective and radiative, and variable thermophysical properties. Three cases are considered: one is related to an adiabatic workpiece, the other two to a diabatic workpiece with a constant or variable heat transfer coefficient on the upper and lower surfaces. Results show that a local quasi-steady state condition is reached after a time that is much larger when the solid is adiabatic than the cases with constant or variable heat transfer coefficient. Thermal gradients along the depth decrease as z and x coordinates increase.
机译：近年来，在许多制造过程中使用局部热源（例如激光和电子束）备受关注。这是由于它们的多功能性以及将大功率集中在较小区域上的可能性。本文对运动的高斯激光束辐射的固体中的二维瞬态热场进行了数值分析。数值模拟考虑了表面热损失，对流和辐射以及可变的热物理性质。考虑了三种情况：一种与绝热工件有关，另一种与在上下表面上具有恒定或可变传热系数的非绝热工件有关。结果表明，经过一定时间后，达到了局部准稳态条件，该时间比具有恒定或可变传热系数的情况大得多。沿深度的热梯度随着z和x坐标的增加而减小。

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