Powder-flow behavior and process mechanism in laser directed energy deposition based on determined restitution coefficient from inverse modeling

doi:10.1016/j.powtec.2022.117355

CORC > 力学研究所 > 中国科学院力学研究所 > 宽域飞行工程科学与应用中心

	Powder-flow behavior and process mechanism in laser directed energy deposition based on determined restitution coefficient from inverse modeling
	Bian, Yanhua 1,2,4; Hea, Xiuli 2,4; Yu, Gang 2,3,4; Li, Shaoxia 2,4; Tiana, Chongxin 2,4; Li, Zhiyong 2,4; Zhang, Yanmei 2,4; Liu, Junming 1
刊名	POWDER TECHNOLOGY
	2022-04-01
卷号	402 页码:14
关键词	Laser directed energy deposition Computational fluid dynamics Powder-flow behavior Restitution coefficient Inverse modeling
ISSN号	0032-5910
DOI	10.1016/j.powtec.2022.117355
通讯作者	Hea, Xiuli(xlhe@imech.ac.cn) ; Yu, Gang(gyu@imech.ac.cn)
英文摘要	In order to clarify the transportation mechanism of particles in continuous coaxial powder feeding (CCPF) process, a trial-and-matching method is developed to quantify the restitution coefficient which is used to describe the inelastic collision between the particle and the nozzle wall. The consistency of the outlet velocity and the spatial concentration distribution of particles between the experimental statistic and the numerical calculation shows that the restitution coefficient of 0.9 can be used to measure the inelastic collision behavior between particles and the nozzle wall. Employing the determined restitution coefficient, a semi-quantitative method based on optical diagnostic and quantitative analysis derived from numerical calculation are proposed to study the powder-gas flow transport characteristics from single-layer to multi-layer jet flow. It is found that the outer shielding gas flow(OSGF) has a great influence on themulti-layer jet flow field, and it ismost conducive to powder focusing at the OSGF of 20 L/min. The velocity distribution of CGF determined by the inner structure of CCPFN and the inelastic collision between the particle and thewall are the twomutually coupled factors that determine the outlet velocity of particles. Frequent inelastic collisions and the decrease of the CGF velocity lead to velocity dispersion and trajectory fluctuation of particles. When the inlet velocity of particles is 1.33 m/s, the outlet velocity ranged from0.4m/s to 0.9m/s. This paper aims to provide a generalmethod to determine the restitution coefficient and offer a comprehensive understanding of transportation mechanism of power particles both inside continuous coaxial powder feeding nozzle (CCPFN) and multi-layer jet zone between substrate and the CCPFN outlet. (c) 2022 Elsevier B.V. All rights reserved.
资助项目	National Natural Science Foundation of China[11502269] ; National Natural Science Foundation of China[11672304] ; plan of Beijing Municipal Commission of Science and Technology[Z181100003818015]
WOS关键词	NUMERICAL-SIMULATION ; STREAM ; VELOCITY ; NOZZLES
WOS研究方向	Engineering
语种	英语
WOS记录号	WOS:000889298300001
资助机构	National Natural Science Foundation of China ; plan of Beijing Municipal Commission of Science and Technology
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/91065]
专题	宽域飞行工程科学与应用中心
通讯作者	Hea, Xiuli; Yu, Gang
作者单位	1.Beijing City Univ, Res Inst 3D Printing, Beijing 100083, Peoples R China 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 3.Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Bian, Yanhua,Hea, Xiuli,Yu, Gang,et al. Powder-flow behavior and process mechanism in laser directed energy deposition based on determined restitution coefficient from inverse modeling[J]. POWDER TECHNOLOGY,2022,402:14.
APA	Bian, Yanhua.,Hea, Xiuli.,Yu, Gang.,Li, Shaoxia.,Tiana, Chongxin.,...&Liu, Junming.(2022).Powder-flow behavior and process mechanism in laser directed energy deposition based on determined restitution coefficient from inverse modeling.POWDER TECHNOLOGY,402,14.
MLA	Bian, Yanhua,et al."Powder-flow behavior and process mechanism in laser directed energy deposition based on determined restitution coefficient from inverse modeling".POWDER TECHNOLOGY 402(2022):14.