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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 discusses in detail a kind of experimental technique applicable to the basic research of aeroelasticity of impeller blades - influence coefficient method. The aerodynamic coupling effect between blade and blade is considered in a simple way to obtain the unsteady aerodynamic response of blade surface (unsteady pressure and unsteady aerodynamic work) at different blade interphase angles, Aeroelastic mechanistic study and verification of numerical simulation program. The difference between aerodynamic elastic foundation experiment with influence coefficient method and traditional aerodynamic elasticity experiment is pointed out. The research results that have been obtained by foreign authors and authors are also introduced. In addition, experimental equipment for the measurement of unsteady pressure on blade surface under different flow conditions at high and low velocities is also introduced. Through this review, we hope to promote the basic experimental research on aeroelasticity of the domestic impeller and provide detailed and valid experimental verification data for the developing numerical tools of aeroelasticity.