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Digital Image Measurement of Velocity Field of Powder Fluid in Laser Manufacturing

zhiqiang.tong 添加于 2010-2-4 16:49 | 1791 次阅读 | 0 个评论

作者
Yang N, Yang XC
摘要
The digital image processing method based on Digital Particle Image Velocimetry technique was developed to measure the velocity field of gas-powder two-phase flow in laser manufacturing. The powder flow image measurement process is composed of image collecting, image saving, velocity vector field and flow line group construction. Two adjacent instantaneous images of the same powder flow were collected by CCD camera. Based on interrelated algorithm, the displacement vector field and the velocity vector field were calculated. The data of the whole velocity field were fitted to construct a group of flow line. Under the same process parameters as measurement, the velocity distribution was simulated by FLUENT software, and the simulated result was compared to the measured result. Results show that, the measurement method could be used to obtain the velocity distribution of powder flow field in laser coaxial cladding online and further design the nozzle size.
详细资料
- 关键词: DPIV; Velocity Field; Coaxial Cladding; Powder Flow
- 文献种类: Conference
- 期刊名称: JOURNAL OF COMPUTATIONAL AND THEORETICAL NANOSCIENCE
- 期卷页: 1525年第5卷第8期 Sp. Iss. SI页
- 出版社: AMER SCIENTIFIC PUBLISHERS, 25650 NORTH LEWIS WAY, STEVENSON RANCH, CA 91381-1439 USA
- 地址: 1. Tianjin Polytech Univ, Laser Proc Ctr, Tianjin 300160, Peoples R China
- ISBN: 1546-1955
- 备注:5th International Conference on Physical and Numerical Simulation of Material Processing (ICPNS 07) Zhengzhou, PEOPLES R CHINA, OCT 23-27, 2007 Chinese Mech Engn Soc; Minerals, Met & Mat Soc; Japan Inst Met; Harbin Inst Technol; Zhengzhou Univ; Henan
学科领域工程技术 » 机械工程
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