摘要
采用涡方法研究叶轮机内动、静叶间的相互作用，它利用全三维的、通道时间平均的定常解为基础解，并由此给出非定常扰动场的初始解。为计算叶片对扰动场的响应过程，采用拉格朗日方法追踪扰动涡团的对流流动过程，用确定性涡方法来描述流体的粘性扩散过程。用该方法对某型压气机的一级（动、静叶栅距比为１．７４）的动、静叶相互作用，进行了二维有粘问题的数值模拟。数值结果表明，该方法具有较好的收敛性和收敛速度；转子出口的尾迹和各种旋涡等非定常因素在静叶通道中的切割、迁移过程，非定常性对静叶攻角的影响以及脉动压力的振幅衰减特性也在文中作了分析。
A disturbance vortex method for simulating unsteady rotor/stator interaction in turbomachinery is presented in this paper.The algorithm takes the result from time-averaged,steady solution as input,which can give an initial description of the unsteady disturbance flow field.To calculate the unsteady response to these disturbances,the Lagrangian vortex method is used to capture the convective process of the disturbance vortex.The deterministic vortex scheme is adopted to approximate the viscous diffusion process.The numerical simulation result of two-dimensional,viscous flow for a high loading transonic compressor with a pitch ratio of 1 74 shows that the method has an excellent ability for convergence and a fast convergent speed.The chopping,migrating process of rotor wake and other vortices,the influence of unsteadiness on incidence and decaying characteristic of the unsteady pressure first harmonic amplitude are included in this paper.
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
1998年第2期128-132,共5页
Journal of Aerospace Power
