Unsteady subsonic flow past two relatively moving flat cascades of thin weakly loaded oscillating blades
Unsteady subsonic flow past two relatively moving flat cascades of thin weakly loaded oscillating blades
复制标题
经过两个相对移动的薄弱负载振荡叶片的扁平叶栅的不稳定亚音速流
DOI：
10.1007/bf01055089
复制
发表时间：
1988
期刊：
影响因子：
0.9
通讯作者：
A. A. Osipov
中科院分区：
文献类型：
--
作者：
K. K. Butenko;A. A. Osipov
在涡轮机颤振的研究中，有必要了解涡轮机中叶栅相互作用对叶栅振荡轮廓的非定常空气动力特性的影响。关于这个问题，文献中没有任何重要的理论结果，对相对运动的叶栅系统中的非定常流动进行分析描述是非常困难的。在作者较早的论文 [1] 中，在叶栅叶片不振荡的情况下，叶栅的气动相互作用问题在小扰动线性理论的框架内得到了解决。在本文中，[1]中开发的方法被推广到振荡剖面级联的情况。如[1]中所示，考虑了薄弱负载轮廓的级联。通过偶极子奇点方法[2]，问题被简化为奇异积分方程的无限系统，当考虑有限数量的谐波时，可以在数值上获得近似解。计算结果表明，叶栅的相互作用对摆动叶片的非定常载荷有显着影响。
In an investigation of the flutter of turbines it is necessary to know what is the influence on the unsteady aerodynamic characteristics of a cascade of oscillating profiles of the interaction of cascades in a turbine. There are no significant theoretical results in the literature on this question, the analytic description of unsteady flow in a system of relatively moving cascades being very difficult. In the case when the cascade blades do not oscillate the problem of the aerodynamic interaction of the cascades was solved in the framework of the linear theory of small perturbations in an earlier paper [1] of the authors. In the present paper the method developed in [1] is generalized to the case of cascades of oscillating profiles. As in [1], cascades of thin weakly loaded profiles are considered. By the method of dipole singularities [2] the problem is reduced to an infinite system of singular integral equations, for which an approximate solution is obtained numerically when a finite number of harmonics is taken into account. The results of the calculations show that the interaction of the cascades can have a significant influence on the unsteady loadings on the oscillating blades.