轴流压气机静子叶片非定常表面压力试验

王英锋; 胡骏

轴流压气机静子叶片非定常表面压力试验

王英锋,
胡骏

南京航空航天大学能源与动力学院,南京 210016

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出版历程
- 收稿日期: 2009-11-17
- 修回日期: 2010-03-22
- 刊出日期: 2010-12-28

Experimental research on unsteady blade surface pressure of axial compressor

College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China

摘要

摘要: 对一台单级轴流压气机静子叶片非定常表面压力进行了测量.叶片非定常表面压力分析表明:失速前,叶片非定常表面压力的主要影响因素为相邻叶排叶片的尾迹和势扰动,叶片非定常表面压力及气动力波动的幅值大小取决于压气机的总压升,主导频率为叶片通过频率及其倍频(主要为2倍频和3倍频),其频率是转子转动频率的整数倍;失速后,叶片非定常表面压力的主要影响因素转变为旋转失速团,主导频率为失速团频率,其频率小于转子转动频率.
- 叶轮机 /
- 非定常气动力 /
- 动态测量 /
- 失速 /
- 尾迹 /
- 势扰动
Abstract: The unsteady surface pressure on stator blade of an axial compressor was measured by means of mounting micro-sensors onto blades surface.The unsteady blade surface pressure was analyzed.There are different factors to play decisive roles on the unsteady surface pressure and unsteady force with the decrease of flow coefficient.Before stall,unsteady blade surface pressure depends on the wake and potential perturbation of adjacent blade row.But after stall,unsteady blade surface pressure depends on the stall cells.Before stall,maximum amplitude of unsteady blade surface pressure and unsteady force occurs at the flow coefficient of maximum total pressure rise.However,after stall,the amplitude of unsteady surface pressure and unsteady force will be much greater than at the maximum total pressure rise.On the other hand,the frequencies of unsteady surface pressure and unsteady force change with the decrease of flow coefficient.Before stall,the dominant frequencies are represented by blade-passing frequency and its harmonics,but after stall,the dominant frequencies are represented by stall cell passing frequency.
- turbomachinery /
- unsteady aerodynamic force /
- dynamic measurement /

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参考文献(13)

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