叶轮机转静干涉计算建模方法比较

Comparison of computation models for simulation of turbomachinery rotor-stator interactions

通过对尾迹-叶片干涉和激波-叶片干涉这两类典型转静干涉流动的模拟,对3种基于傅里叶分析的时域非定常计算建模方法,即形修正相延迟法、空间-时间梯度法和谐波平衡法进行对比分析;详细考察它们的区别与联系,不同方法的计算准确度和计算速度.计算表明:3种建模方法都可以很好地捕捉到非定常流动细节;与传统的时间推进法相比,计算速度提高了几倍到几十倍,可用于工程设计之中.

Comparative study on three Fourier-based time-domain unsteady computation methods, including the shape-correction phase shift method, space-time gradient method and harmonic balance method, was carried out by simulation of two typical kinds of rotor-stator interactions, i. e. ： wake-blade interactions and shock-blade interactions. Differences and relations between these computation methods were investigated in detail, and their computa- tional accuracy and speed were also analyzed. The results indicate that three methods can re- solve the unsteady flow details well. Compared with the conventional time-marching method, the computational speed of these methods can be enhanced from several to dozens of times, making these methods applicable to daily design process.