A Novel Approach for Numerical Modeling of Reactive-Gas-Assisted Laser Cutting of Thick Metals

厚金属活性气体辅助激光切割数值模拟的新方法

• 批准号: 9407735
• 负责人: Palaniappa Molian
• 金额: $ 21.73万
• 依托单位: Iowa State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-09-15 至 1998-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9407735&HistoricalAwards=false
• 关键词: Novel; Approach; Numerical; Modeling; Reactive

9407735 Molian The award is for research to a model for the reactive gas-assisted laser cutting of thick metals, which is based on solving the fundamental equations of mass, energy, and momentum, in both the molten film and gas regions. Experiments are proposed for verification as well as reevaluation of the proposed model. The erosion front is treated as a free surface and is allowed to assume its profile depending on the momentum transfer from the gas jet. Combustion phenomena in the molten film are modeled using first order reaction kinetics. The approach is expected to yield a satisfactory representation of the coupling between various physical phenomena such as fluid dynamics, heat transfer, and combustion. The research is expected to result in improved understanding of the laser cutting process and development of more efficient cutting procedures. Given the increasing availability of more powerful lasers for manufacturing applications, the improved understanding achieved here would enable better utilization of these advances in material processing capability.

小行星9407735 该奖项是为了研究厚金属的反应气体辅助激光切割模型，该模型基于在熔融膜和气体区域求解质量，能量和动量的基本方程。 实验提出的验证以及重新评估所提出的模型。 侵蚀前沿被视为一个自由表面，并被允许承担其轮廓取决于从气体射流的动量转移。 采用一级反应动力学对熔融膜中的燃烧现象进行了模拟。 该方法预计将产生一个令人满意的代表性的各种物理现象，如流体动力学，传热和燃烧之间的耦合。 该研究有望提高对激光切割过程的理解，并开发出更有效的切割程序。 鉴于制造应用中更强大的激光器越来越多，本文所获得的更好的理解将使材料加工能力的这些进步得到更好的利用。