电站锅炉调节阀管配系统流场特性的数值分析  

Simulation of the flow field characteristics of the boiler control valve pipe system of a power station

作　　者：刘晓叙[1] 刘佳[1] 何庆中[1] 郭斌[1] Liu Xiaoxu Liu Jia He Qingzhong Guo Bin(Institute of Mechanical Engineering, Sichuan University of Science ＆ Engineering, Zigong 643000, Siehuan Province, P. R. Chin)

机构地区：[1]四川理工学院机械工程学院,四川自贡643000

出　　处：《深圳大学学报（理工版）》2017年第1期105-110,共6页Journal of Shenzhen University(Science and Engineering)

基　　金：国家能源局国能科技基金资助项目(2011HVCHT095);自贡市科技创新苗子工程资助项目(2015CXM03)~~

摘　　要：分析某火电机组储水罐调节阀在运行中出现的阀后配管端盖损坏问题,建立该调节阀和配管的计算流体动力学模型,利用CFD软件CFX对其进行两相流流场特性分析.结果表明,调节阀在节流口处发生了强烈的汽化现象,导致配管底板处冲蚀力较大,汽蚀冲击现象严重,分析结果与实际破坏情况相符.结合分析改进了调节阀配管系统结构,并对改进后的结构进行流场数值模拟,结果表明,在配管底板处流场速度降低近70%,汽相体积减少90%以上,汽蚀冲击现象减弱,分析结果可供该类阀门和配管设计参考.In order to analyze the problem that the piping end cover behind the regulator valve used in the water storage tank regulator of one thermal power unit is damaged during operating, the computational fluid dynamics （CFD） model for the valve and the piping is established, and the characteristic of two-phase flow field is studied by using CFD software CFX. The results show that cavitation is serious near the gap of the stem, which causes greater erosion force near the baseboard, and the computational results are consistent with that of the actual damage case The piping structure of the regulator valve is improved according to the results, and numerical simulation of the flow field is done for the improved piping structure. The simulation results of the improved piping structure show that the flow speed is reduced by nearly 70%, and the bubble collapse is reduced by over 90% , the cavitation phenomenon is suppressed. The results can be used as the reference valves and piping. for the structural design and optimization of this kind of

关 键 词：计算流体力学 调节阀 两相流 CFX软件 汽蚀 结构优化 

分 类 号：TH138.52[机械工程—机械制造及自动化]