不同气流环境下激光辐照金属材料温升的数值模拟

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Numerical simulation of thermal effect on metal irradiated by high-power laser beam in different airflow

1.
State Key Laboratory of Laser Interaction with Matter,Northwest Institute of Nuclear Technology,P.O.Box 69-12,Xi’an,710024,China;
2.
School of Electronic and Information Engineering,Xi’an Jiaotong University,Xi’an 710049,China

摘要: 研究了激光辐照金属材料过程中的氧化放热模型，采用有限元方法编制了计算程序，数值计算了激光辐照钢板在吹空气、吹氮气以及不吹气条件下温升的时空分布，分析了氧化放热量的大小。数值计算结果表明：吹氮气和不吹气条件下，钢板背表面温升的差异不大；在吹空气条件下，氧化放热量约占钢板中沉积能量的34.6%。数值计算结果与文献报道的实验结果符合得很好。
- 高能激光 /
- 温升 /
- 气流 /
- 氧化 /
- 有限元法
Abstract: This paper studied the model about heat release from the oxidation when the high-energy laser irradiated the iron plate, and a numerical simulation code was developed by using the finite-element method. The temporal and spatial distributions of temperature in the iron plate were simulated under the conditions of airflow, nitrogen flow, or no flow. The quantity of heat in the course of oxidation was analyzed. Numerical results indicated that the difference of temperature rising was very small under the conditions of nitrogen flow and no flow, and the quantity of heat release in oxidation was approximately 35% of the total energy deposited in the iron plate for the air flow condition. The numerical results agreed well with the experimental results reported in the open literature.
- high-energy laser /
- temperature rising /
- air flow /
- oxidation /
- finite-element method

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