吸气可以改变叶片周围的气流特性，多用来控制叶片吸力面流动分离。本文将吸气应用于叶片减振，通过模型实验研究了吸气对叶片振动的影响，改变吸气位置和吸缝长度，测量了不同条件下的叶片振幅并作比较。数值模拟计算了不同位置、不同速度吸气对叶片周围流场的影响，重点分析了叶顶间隙气流速度的变化。数值计算在一定程度上解释了实验结论，二者所得的规律统一。最终结果表明：叶片正上方或上方偏来流侧吸气有明显减振效果，模型实验条件下，振幅最大降低了27%。

Suction can influence the air performance around blade. It is used to control flow separation along surface of a blade. Variations of blade vibration are studied in experiment with suction. Blade amplitude is measured at different suction positions or gap lengths. Effect of fluid field around blade is analyzed by numerical simulation in different conditions, suction from different positions or with different velocities. However, the impact of gas velocity at tip clearance is emphasized. The laws from experiment study and simulation calculation are entirely consistent. Some important conclusions are given in this paper. Especially, vibration could be suppressed after suction before or above blade. The maximal attenuation of blade amplitude is up to 27% in the experiment condition.