Evaluation and optimal design of supersonic nozzle for laser-assisted oxygen cutting of thick steel sections

doi:10.1007/s00170-015-8268-7

	Evaluation and optimal design of supersonic nozzle for laser-assisted oxygen cutting of thick steel sections
	Zhang, C; Wen, P; Yuan YM(袁越明); Fan XJ(范学军); Wen, P (reprint author), Tsinghua Univ, State Key Lab Tribol, Beijing 100084, Peoples R China.; Wen, P (reprint author), Tsinghua Univ, Dept Mech Engn, Beijing 100084, Peoples R China.
发表期刊	INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
	2016
卷号	86 期号:2016-05-08 页码:1243-1251
ISSN	0268-3768
摘要	With the full use of combustion heat from Fe-O reaction, laser-assisted oxygen cutting (LASOX) is able to cut thick mild steel plates by a defocused laser of medium power (approximately 1 kW). The dynamic behavior of oxygen gas flow, determined by nozzle structure and cutting parameters, is the key factor affecting cut ability and quality. It is significant to understand the method to design a suitable supersonic nozzle and to evaluate its performance. A supersonic minimum length nozzle (MLN) was designed and made specially for LASOX. The configuration (D (exit)/D (critical)) of the designed nozzle was chosen based on two-dimensional isentropic calculation of dynamic gas pressure. The divergent section of the MLN was designed in accordance with the method of characteristics (MOC). Numerical simulation and Schlieren visualization were used to observe and compare the flow behavior of the free jet from the designed MLN nozzle and a commercial supersonic nozzle. The MLN nozzle generates a highly uniform and stable supersonic jet extending a longer distance along the axis of nozzle, which is around 1.4 times longer than that from the commercial supersonic nozzle. Mild steel plates in 20 mm thickness were cut to investigate the effect of cutting parameters on LASOX cut quality of two nozzles. The MLN significantly improved cutting quality due to the better performance of gas flow. The optimal cut quality is related to both oxygen pressure and cutting speed. The oxygen content was measured along the cut surface to explain the difference in cut quality.
关键词	Laser Cutting Supersonic Nozzle Numerical Simulation Flow Visualization
DOI	10.1007/s00170-015-8268-7
URL	查看原文
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000383084300011
关键词[WOS]	Laser cutting ; Supersonic nozzle ; Numerical simulation ; Flow visualization
WOS研究方向	Automation & Control Systems ; Engineering
WOS类目	Automation & Control Systems ; Engineering, Manufacturing
项目资助者	This work was supported by the Tsinghua University Initiative Scientific Research Program.
课题组名称	LHD超声速燃烧
论文分区	二类
力学所作者排名	False
引用统计	被引频次：16[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/59726
专题	高温气体动力学国家重点实验室
通讯作者	Wen, P (reprint author), Tsinghua Univ, State Key Lab Tribol, Beijing 100084, Peoples R China.; Wen, P (reprint author), Tsinghua Univ, Dept Mech Engn, Beijing 100084, Peoples R China.
推荐引用方式 GB/T 7714	Zhang, C,Wen, P,Yuan YM,et al. Evaluation and optimal design of supersonic nozzle for laser-assisted oxygen cutting of thick steel sections[J]. INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY,2016,86,2016-05-08,:1243-1251.
APA	Zhang, C,Wen, P,袁越明,范学军,Wen, P ,&Wen, P .(2016).Evaluation and optimal design of supersonic nozzle for laser-assisted oxygen cutting of thick steel sections.INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY,86(2016-05-08),1243-1251.
MLA	Zhang, C,et al."Evaluation and optimal design of supersonic nozzle for laser-assisted oxygen cutting of thick steel sections".INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY 86.2016-05-08(2016):1243-1251.

条目包含的文件		下载所有文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
a2016-066.pdf（1832KB）	期刊论文	作者接受稿	开放获取	CC BY-NC-SA	浏览下载