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《Chinese Journal of Lasers》 2008-11
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Effect of Gas Outlet Mach Number on Mach Shock Disk in Laser Cutting

Hu Jun Qiu Mingyong Guo Shaogang(The State Key Laboratory of Mechanical System and Vibration,School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)  
The structure of Mach shock disk(MSD) is analysed emphatically by constructing free jet model,adopting compressible liquid axial symmetric N-S equation and RNG k-ε model.Through the numerical simulation of free jet outer flow field under the outlet static pressure of 6.145×105 Pa,the paper describes the jet structures of different outlet Mach numbers,analyses the relation between MSD and outlet Mach number of nozzles.It reveals that the width of MSD presents convergent trend with the increasing of Mach number,and indicates that the outlet Mach number should be improved properly by ensuring disappearance of overexpanding waves under the working pressure.It is illuminated that the Mach number will be convergent to a fixed position with the increasing of outlet Mach number.The veracity of simulation results and the validity of conclusion analysis are proved by contrasting validating of flow field visualization to the solved model.
【Fund】: 上海市科学技术发展基金登山计划(06DZ11418)资助课题
【CateGory Index】: TG485
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【Citations】
Chinese Journal Full-text Database 3 Hits
1 LI Xiang you, ZENG Xiao yan (State Key Laboratory of Laser Technology, Huazhong University of Science and Technology, Wuhan 430074);Kerf Roughness and Quality Control of Laser Precision Cutting[J];Chinese Journal of Lasers;2002-02
2 LIAO Jian-hong1, MENG Hong-yun1, WANG Hong-wei2, GUAN Bang-gui1,ZHOU Yong-heng1, ZHANG Qing-mao1, HE Wei21Laboratory of Photon Information Technology, South China Normal University, Guangzhou, Guangdong 510631, China2Guangzhou Ruitong Kilometer Laser Equipment Co., Ltd, Guangzhou, Guangdong 510380, China;Investigation and Applications of Fiber Laser Precision Cutting System[J];Chinese Journal of Lasers;2007-01
3 Hu Jun Guo Shaogang Luo Lei Yao Zhenqiang(School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China);Dynamic Characteristic Analysis of Impinging Jet in Laser Drilling[J];Chinese Journal of Lasers;2008-08
【Co-citations】
Chinese Journal Full-text Database 6 Hits
1 Peng Bo Liu Qiang Gong Mali Yan Pin(State Key Laboratory of Tribology,Center for Photonics and Electronics,Department of Precision Instruments,Tsinghua University,Beijing 100084,China);All-Fiber Q-Switched Laser by Modulating Coupling Loss[J];Chinese Journal of Lasers;2008-03
2 Yin Shupeng Yan Ping Li Chen Gong Mali(Department of Precision Instruments,Tsinghua University,Beijing 100084,China);Extraction Efficiency in Continuous-Wave Ytterbium-Doped Fiber Amplifier[J];Chinese Journal of Lasers;2008-06
3 Hu Jun Guo Shaogang Luo Lei Yao Zhenqiang(School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China);Dynamic Characteristic Analysis of Impinging Jet in Laser Drilling[J];Chinese Journal of Lasers;2008-08
4 Yang Wei1 Peng Xinhan2 Zhang Jun11Institute of Opto-Electronic Information,Yantai University,Yantai,Shandong 264005,China2Shenzhen Musen Technologies Co,.Ltd.Shenzhen,Guangdong 518102,China;Study of Laser Cutting Technology for Silicon Wafer under Water[J];Chinese Journal of Lasers;2009-11
5 Wang Di Yang Yongqiang Wu Weihui (College of Mechanical and Automobile Engineering,South China University of Technology,Guangzhou,Guangdong 510640,China);Process Optimization for 316L Stainless Steel by Fiber Laser Selective Melting[J];Chinese Journal of Lasers;2009-12
6 Zhu Hu Fu Jianhui (College of Mechanical and Electrical Engineering,Shenyang Institute of Aeronautical Engineering,Shenyang,Liaoning 110136,China);5-Axis Laser Cutting Interference Detection and Correction Based on STL Model[J];Chinese Journal of Lasers;2009-12
【Secondary Citations】
Chinese Journal Full-text Database 4 Hits
1 LIU-Songhao(School of Information Optronics Sciences and Technology, South China Normal University Guangzhou 510631,China);New Development of Fiber Laser[J];Optoelectronic Technology & Information;2003-01
2 CHEN Miao-hai (North China Research Institute of Electro-Optics,Beijing 100015,China);Development Prospect and Present Situation on Laser Processing Industry in China[J];Laser & Infrared;2004-01
3 CHEN Ji min ZUO Tie chun (National Center of Laser Technology, Beijing Polytechnic University, The Institute of Laser Engineering, Beijing 100022);Effect of Laser Beam Incident Angle on Laser Cutting Quality[J];Chinese Journal of Lasers;2001-11
4 LI Xiang you, ZENG Xiao yan (State Key Laboratory of Laser Technology, Huazhong University of Science and Technology, Wuhan 430074);Kerf Roughness and Quality Control of Laser Precision Cutting[J];Chinese Journal of Lasers;2002-02
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