摘要
建立了迷宫式汽封的全三维模型,采用CFD商业软件Fluent对不同工况下汽封的流场进行了计算分析,研究了转子所受的气流力与转速、进出口压力比及偏心率的关系,得到了影响转子稳定性的密封动力特性系数和涡动系数.结果表明:随着转速、进出口压力比和偏心率的增大,涡动系数也相应增大,转子的稳定性下降.
A full three-dimensional model was set up for a labyrinth seal, in which the flow field was calcu- lated and analyzed under different working conditions using commercial CFD software Fluent, so as to study the relations of the fluid-induced force with the rotational speed, pressure ratio and the eccentricity, etc. , and to obtain the dynamic coefficient and whirl coefficient of the seal that may influence the stability of the rotor. Results show that with the rise of rotational speed, pressure ratio and eccentricity, the whirl coefficient increases accordingly, and the stability of the rotor is hence reduced.
出处
《动力工程学报》
CAS
CSCD
北大核心
2017年第1期21-25,共5页
Journal of Chinese Society of Power Engineering
基金
国家自然科学基金资助项目(11402148)
关键词
迷宫式汽封
气流力
动力特性
数值计算
labyrinth seal
fluid-induced force
dynamic characteristic
numerical simulation
