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为了把激光加热静止圆柱壳的实验测量结果应用到旋转圆柱壳的激光参量估计中,研究了旋转圆柱壳的激光加热效率。用积分变换法得到了旋转圆柱壳的温度分布,分析了最大温升点相对激光峰值强度点的滞后现象。基于静止圆柱壳和薄壳假设,导出了旋转圆柱壳激光加热效率及估计辐照时间的表达式。对于旋转金属圆柱壳,最大温升点相对激光峰值强度点的滞后角和激光加热效率取决于无量纲参量DR(柱壳半径R与束斑半径r0之比)、DL(横向热扩散尺度4ατL与束斑半径r0之比)及DM(加热时间τL与柱壳旋转频率fR的乘积)。达到相同的最大温升时,旋转圆柱壳的激光辐照时间和静止圆柱壳的激光辐照时间之间存在与激光功率无关的非线性关系,而激光功率决定了所需的绝对激光辐照时间。
In order to apply the experimental results of laser heated stationary cylindrical shell to the laser parametric estimation of rotating cylindrical shell, the laser heating efficiency of rotating cylindrical shell was studied. The temperature distribution of the rotating cylindrical shell was obtained by the integral transformation method, and the hysteresis of the maximum temperature rise point relative to the laser peak intensity point was analyzed. Based on the assumption of stationary cylindrical shell and thin shell, the expression of laser heating efficiency of rotating cylindrical shell and the estimation of irradiation time are derived. For a rotating cylindrical metal shell, the lag angle and laser heating efficiency at the point of maximum temperature rise relative to the peak laser intensity depend on the dimensionless parameter DR (the ratio of the radius of the shell radius R to the radius of the beam spot r0), DL (lateral thermal diffusion scale 4ατL and Beam spot radius r0 ratio), and DM (product of heating time τL and column shell rotation frequency fR). At the same maximum temperature rise, there is a non-linear relationship between the laser irradiation time of the rotating cylindrical shell and the laser irradiation time of the stationary cylindrical shell, which is independent of the laser power, and the laser power determines the required absolute laser irradiation time .