摘要
为提高新型水煤浆喷嘴的抗冲蚀性能,采用有限元分析法,对新型水煤浆喷嘴稳定工作时的温度和应力场进行了分析计算;并对超音速喷涂制备的涂层与等离子喷涂涂层、激光熔覆制备涂层与喷嘴材料哈氏合金的冲蚀性能进行试验研究。结果表明喷嘴稳定工作时,出口端部的温度较高、温度梯度较大,水煤浆通道温度在300～500℃。热应力最大值发生在冷却水套管的外壁圆角处,同时喷嘴出口端部应力较大。在不同的冲蚀速度下,3种涂层的抗冲蚀能力均优于哈氏合金,且超音速喷涂制备涂层的抗冲蚀能力最优。
Temperature field of new coal water slurry (CWS) nozzle was analyzed through using finite element method, in order to improve the erosion resisting performance of the nozzle. Moreover, the comparison of erosion behavior of high-velocity oxyfuel (HVOF) sprayed coating, plasma sprayed coating, and laser melting coating with Hastelloy alloys was investigated. The results show that the temperature and temperature gradient at the exit surfaces of the CWS nozzle were higher than that of other parts of the nozzle....
出处
《中国表面工程》
EI
CAS
CSCD
北大核心
2010年第4期70-73,77,共5页
China Surface Engineering
基金
国家自然科学基金(50805048)
上海市自然科学基金(08ZR1405700))
教育部新教师基金(200802511008)
关键词
喷嘴
涂层
温度
水煤浆
nozzle
coating
temperature
coal water slurry
