摘要
采用自编理想气体两控制容积bulk flow计算程序及非定常数值求解方法,对孔型阻尼密封内的非定常气流激振特性开展了研究。利用实验测量得到的孔型阻尼密封转子动力特性系数,对两种两控制容积bulk flow方法、3种湍流模型的计算精度进行了考核。研究表明:本文的理想气体两控制容积bulk flow计算程序预测精度与等温bulk flow程序ISOTSEAL相近;非定常数值求解结果比bulk flow方法预测的结果更接近实验值;阻尼密封内湍流效应比较显著,但温度变化十分微弱,采用合理的湍流模型是提高孔型阻尼密封转子动力特性系数非定常求解精度的有效方法。
Using the developed two-control-volume ideal-gas bulk flow codes and transient CFD method,the fluid-induced-excitation characteristic of a hole-pattern seal was numerically investigated in the present paper.The reliability and accuracy of two types of bulk flow methods and transient numerical solutions were validated by the measured rotordynamic coefficients of the hole-pattern seal.The results show that the accuracy of the present two-control-volume ideal-gas bulk flow method is close to the isothermal bulk flow codes ISOTSEAL.However,the predicted rotordynamic coefficients with transient CFD solutions were more agreeable with the experimental data than that of bulk flow methods.It also indicates the turbulence effect in the hole-pattern seal is significant but the temperature variation is slight.To improve the accuracy of rotordynamic coefficients prediction,a suitable turbulence model in the transient CFD method is of importance for the hole-pattern seal.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2014年第4期651-654,共4页
Journal of Engineering Thermophysics
基金
中央高校基本科研业务费专项基金
国家自然科学基金资助项目(No.51106122)
