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

IMECH-IR > 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 YH(边艳华); He XL(何秀丽); Yu G(虞钢); Li SX(李少霞); Tian CX(田崇鑫); Li ZY(李志永); Zhang YM(张艳梅); Liu JM
通讯作者	Hea, Xiuli([email protected]) ; Yu, Gang([email protected])
发表期刊	POWDER TECHNOLOGY
	2022-04-01
卷号	402 页码:14
ISSN	0032-5910
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.
关键词	Laser directed energy deposition Computational fluid dynamics Powder-flow behavior Restitution coefficient Inverse modeling
DOI	10.1016/j.powtec.2022.117355
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000889298300001
关键词[WOS]	NUMERICAL-SIMULATION ; STREAM ; VELOCITY ; NOZZLES
WOS研究方向	Engineering
WOS类目	Engineering, Chemical
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]
项目资助者	National Natural Science Foundation of China ; plan of Beijing Municipal Commission of Science and Technology
论文分区	二类/Q1
力学所作者排名	1
RpAuthor	He, Xiuli ; Yu, Gang
引用统计	被引频次：13[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/311007/91066
专题	宽域飞行工程科学与应用中心
推荐引用方式 GB/T 7714	Bian YH,He XL,Yu G,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.Rp_Au:He, Xiuli, Yu, Gang
APA	边艳华.,何秀丽.,虞钢.,李少霞.,田崇鑫.,...&Liu JM.(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	边艳华,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.

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