测量叶轮机振动叶片表面非定常气动响应的实验技术——影响系数法

Experimental technique for measuring unsteady aerodynamics of vibrating blade in turbomachinery——influence coefficient method(ICM)

详细论述了一种适用于叶轮机叶片气动弹性基础性研究的实验技术——影响系数法。以一种简单的方式考虑叶片与叶片之间的气动耦合效应,从而获得叶盘耦合系统在不同叶片间相位角下,叶片表面非定常气动响应(非定常压力和非定常气动功),用于气动弹性机理性研究并校核数值模拟程序。指出影响系数法气动弹性基础实验与传统气动弹性实验的区别,介绍了国外以及作者已经取得的研究成果,其中也涉及到高低速不同流动状态下,叶片表面非定常压力测量的实验设备。通过这一综述,以期推动国内叶轮机气动弹性基础实验的开展,为正在发展的气动弹性数值模拟工具提供详细、有效的实验验证数据。

This paper is a review of the experimental technique influence coefficient method （ICM） for the fundamental research on blade aeroelasticity in turbomachinery. It is a simple technique to obtain unsteady blade surface aerodynamics （including unsteady pressure and unsteady aerodynamic work） of vibrating blade-disk system under different inter-blade phase angles with consideration of the aerodynamic coupling between blade to blade. The results are used not only to provide an insight into the mechanism of blade aeroelasticity, but also to validate numerical simulations. The differences between the fundamental aeroelastie experiments using ICM and the traditional aeroelastic tests are pointed out. The abroad and the author＇s research achievements using ICM are introduced. It also mentions the experimental facilities for measuring unsteady surface pressures in low and high speed flow regimes. This review is used to promote domestic fundamental aeroelastic experiments using ICM in order to provide detailed experimental validation data for the developing numerical simulation tools.