喷嘴出口截面形状对冷喷涂涂层性能影响的数值分析

基金项目:

国家自然科学基金资助项目(50476075)

详细信息

Computational Simulation of the Effect of Nozzle Export Section Shape on Cold Spraying Technology for Material Modification

摘要: 制备冷喷涂涂层的沉积速度、有效喷涂面积及均匀程度与喷嘴出口截面形状有重要关联.通过对冷喷涂射流流场的数值模拟,比对了不同喷嘴截面形状的流场特点.结果表明:矩型喷嘴截面形状有利于大面积均匀涂层生成,相同条件下,所制备涂层的性能优于圆型喷嘴,这与相关试验结果吻合较好.
- 冷喷涂 /
- 喷嘴截面 /
- 数值模拟
Abstract: The speed of coating growth,the area of effective spraying and the eveness of spraying had important relationship with nozzle export section shape.By the numerical simulation of jet-flow field,comparison of the important feature of different nozzle export section shapes,indicates that nozzle export section with rectangle shape is good for the even coating of big area spraying,and better than that with circle shape.This conclusion coincides well with relative result in laboratory.
- cold spraying /
- nozzle export section /
- numerical simulation

[1]	王晓放,黄钟岳.新型材料改性方法常温超音速冷喷涂制备功能涂层[J].机械工程材料,2002,26(5):30-35.
[2]	赵爱娃,王晓放.冷喷涂制备功能涂层工艺中的两相射流数值研究[J].大连理工大学学报,2006,46(2):190-193.
[3]	易灿,李根生.喷嘴结构对高压射流特性影响研究[J].石油钻采工艺,2005,27(1):16-19.
[4]	Blose R E,Roemer T J.Automated cold spray system:Description of Equipment and Performance Data[A].Thermal Spray 2003 (Ed)[C].Material Park,USA:ASM International,2003.
[5]	丁丽,王晓放.冷喷涂材料改性技术中粒子与基板结合过程的研究[J].机械工程材料,2004,28(10):26-28.
[6]	王晓放,黄钟岳,王德真,等.冷喷涂材料改性气粉射流流动计算与分析[J].大连理工大学学报,2000,40(5):562-565.
[7]	Yin Nen Jeng,Uon Jan Payne.An Adaptive TVD Limiter[J].Journal of Computational Physics,1995,118:229-241.