论文名称：Investigation on the Clogging Behavior and Additional Wall Cooling for the Axial-Injection Cold Spray Nozzle
论文类型：期刊论文
发表刊物：JOURNAL OF THERMAL SPRAY TECHNOLOGY
收录刊物：SCIE、EI、Scopus
卷号：24
期号：4
页面范围：696-701
ISSN号：1059-9630
关键字：aluminum; cold spray; computational fluid dynamics (CFD); nozzle clogging; nozzle cooling
摘要：During the cold spray process, nozzle clogging always happens when spraying low-melting point materials, e.g., aluminum, significantly decreasing the working efficiency. In this paper, a comprehensive investigation was carried out to clarify the reason for inducing nozzle clogging and then to evaluate a home-made nozzle cooling device for preventing nozzle clogging. Computational fluid dynamics technique was employed as the main method with some necessary experiment validation. It is found that the particle dispersion and the high-temperature nozzle wall at the near-throat region are two dominant factors that cause nozzle clogging. The numerical results also reveal that the home-made cooling device can significantly reduce the nozzle wall temperature, which was validated by the experimental measurement. Besides, the aluminum coating build-up experiment further indicates that the additional cooling device can truly prevent the nozzle clogging.
发表时间：2015-04-01