Numerical analysis of supersonic gas-dynamic characteristic in laser cutting

被引:23
作者
Guo, Shaogang [1 ]
Jun, Hu [1 ]
Lei, Luo [1 ]
Yao, Zhenqiang [1 ]
机构
[1] Shanghai Jiao Tong Univ, Sch Mech & Power Energy Engn, Shanghai 200240, Peoples R China
关键词
Laser cutting; Jet; Shock; Standoff distance; Cut quality; JET; PRESSURE; FLOW;
D O I
10.1016/j.optlaseng.2008.07.020
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
The influnce of the processing parameters oil the dynamic characteristic of supersonic impinging jet in laser cutting is studied numerically. The numerical modeling of a supersonic jet impinging on a plate with a hole is presented to analyze the gas jet-workpiece interaction. The model is able to make quantitative predictions of the effect of the standoff distance and exit Mach number oil the mass flow rate and the axial thrust. The numerical results show that the suitable cutting range is slightly different for different exit Mach number, but the optimal cutting parameter for certain exit total pressure is nearly changeless. So the better cut quality and capacity can be obtained mainly by setting the suitable standoff distance for a certain nozzle pressure. (C) 2008 Elsevier Ltd. All rights reserved
引用
收藏
页码:103 / 110
页数:8
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