摘要
本文介绍了旋转机械非定常数值模拟的非线性谐波方法,并对某低速轴流涡轮的流场进行了数值模拟,获得了该涡轮通道内的非定常流场结构。在与实验结果及定常计算结果对比确认的基础上,分析了该涡轮动静叶间干涉与非定常流动特性,并比较了谐波阶数和工质的压缩性对计算结果的影响。研究结果表明,非线性谐波方法可有效地模拟动静非定常干涉。
The nonlinear harmonic method for numerical simulation of the unsteady flow in turbomachinary is introduced through the investigation on a low speed axial turbine. The calculated velocity distribution after nozzle and limiting streamline pattern on blade surfaces are well compared with the experiment results. Based on the good validation, discussions are mainly focused on the interaction between blade rows and the unsteady flow structure in passage. The effects of harmonic order and compressibility of gas are also presented in this paper. The results show that the nonlinear harmonic method could capture the interaction between rotor and stator effectively.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2009年第6期949-952,共4页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.90718025)
关键词
非线性谐波方法
非定常流动
低速轴流涡轮
数值模拟
nonlinear harmonic method
unsteady flow
low speed axial turbine
numerical simulation
