[1]张素芝,高燕青,林新美,等.低速大熔滴扁平化过程的温度变化[J].华侨大学学报(自然科学版),2010,31(5):483-486.[doi:10.11830/ISSN.1000-5013.2010.05.0483]
　ZHANG Su-zhi,GAO Yan-qing,LIN Xin-mei,et al.Temperature Variation During the Splatting Process with Low-Speed Big Droplet[J].Journal of Huaqiao University(Natural Science),2010,31(5):483-486.[doi:10.11830/ISSN.1000-5013.2010.05.0483]
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低速大熔滴扁平化过程的温度变化()
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《华侨大学学报（自然科学版）》[ISSN:1000-5013/CN:35-1079/N]

卷:
第31卷
期数:
2010年第5期
页码:
483-486
栏目:
出版日期:
2010-09-20

文章信息/Info

Title:
Temperature Variation During the Splatting Process with Low-Speed Big Droplet
文章编号:
1000-5013(2010)05-0483-04
作者:
张素芝; 高燕青; 林新美; 赵紫玉
华侨大学机电及自动化学院
Author(s):
ZHANG Su-zhi;  GAO Yan-qing;  LIN Xin-mei;  ZHAO Zi-yu
College of Mechanical Engineering and Automation, Huaqiao University, Quanzhou 362021, China
关键词:
低速;  大熔滴;  扁平化;  温度
Keywords:
low-speed;  big droplet;  splatting;  temperature
分类号:
TG174.4
DOI:
10.11830/ISSN.1000-5013.2010.05.0483
文献标志码:
A
摘要:
为了便于研究喷涂过程中熔滴粒子的碰撞扁平行为,根据雷诺数力学相似性准则,采用低速大熔滴撞击基体来模拟粒子的碰撞扁平行为.设计一个基于快速热电偶的温度采集装置,分别对Sn-Pb,Zn和Zn-Al熔滴与基体碰撞扁平,以及冷却凝固过程的温度变化进行检测与分析.研究表明,一定速度的熔滴粒子撞击基体后,会以粒子轴为中心,在基体表面向四周任意方向发生横向铺散流动.其温度曲线是先急剧升高到峰值,然后快速下降,并且随着时间的增加,下降速率开始慢慢减小; 由于Zn-Al熔滴的潜热值最大,其冷却凝固的时间相对于Sn-Pb,Zn熔滴的冷却凝固时间更长.
Abstract:
In order to investigate the splatting process of thermal sprayed droplets,this paper adopts the low-speed big droplets impinged on the substrate to simulate collision and flattening process of particles,based on the rule of Reynolds number similarity criteria.A temperature acquisition device with fast thermocouple is designed for the detection and analysis of temperature variation in the splatting and solidification process with Sn-Pb,Zn and Zn-Al droplets.The results have shown that after the droplet is impinged on the substrate with a certain velocity,the droplet transversely flows and spreads in random direction centering on the particle axis; the temperature curve first rises to the peak and then declines rapidly,as time increases,the decline rate is slowly reduced; compared to Sn-Pb and Zn droplets,Zn-Al droplet has longer time in solidification and cooling because of the largest latent heat.

参考文献/References:

[1] GOUGEON P, MOREAU C. Simultaneous independent measurement of splat diameter and cooling time during impact on a substrate of plasma-sprayed molybdenum particles [J]. Journal of Thermal Spray Technology, 2001(1):76-82.doi:10.1361/105996301770349538.
[2] FAUCHAIS P. Understanding plasma-spraying [J]. Journal of Physics D:Applied Physics, 2004(9):86-108.doi:10.1088/0022-3727/37/9/R02.
[3] ESCURE C, VARDELLE M, VARDELLE A. Visualization of the impact of drops on a substrate in plasma spraying:Deposition and splashing modes [A]. 新加坡, 2001.28-30.
[4] FUKUMOTO M, NISHIYAMA T, NISHIOKA E. Effectof surface morphology of substrate on flattening behavior of freely fallen metal droplet [A]. Essen, 2002.37-41.
[5] AMADA S, OHYAGI T, HARUYAMA M. Evaluation of splat profile for droplet impingement [J]. Surface and Coatings Technology, 1999, (2/3):184-192.doi:10.1016/S0257-8972(99)00175-9.
[6] AMADA S, IMAGAWA K, AOKI S. Splat profile of impinging droplets on rough substrates:Influence of suface roughness [J]. Surface and Coatings Technology, 2002(1):27-33.doi:10.1016/S0257-8972(01)01517-1.
[7] 皮涛, 李京龙, 李长久. 低速大熔滴模拟热喷涂熔滴扁平化过程的研究 [J]. 甘肃工业大学学报, 1998(4):14-18.
[8] GHAFOURI-AZAI R, SHAKREI S, CHANDRA S. Interactions between molten metal droplets impinging on a solid surface [J]. International Journal of Heat and Mass Trans, 2003(8):1395-1407.doi:10.1016/S0017-9310(02)00403-9.
[9] GHAFOURI-AZAI R, YANG Z, CHANDRA S. Impact of molten metal droplets on the tip of a pin projecting from a flat surface [J]. International Journal of Heat and Fluid Flow, 2005(2):334-347.doi:10.1016/j.ijheatfluidflow.2004.08.004.

备注/Memo

备注/Memo:
福建省自然科学基金资助项目(2009J01254); 福建省发改委小发明专项基金资助项目(20061095); 华侨大学实验教学改革与建设项目(20090120)
更新日期/Last Update: 2014-03-23