Noise Characteristics Corresponding to High-level Rotor Blades Nonsynchronous Vibrations in an Axial Compressor
Nonsynchronous vibrations (NSVs) with high amplitude levels in the first rotor blades of a multi-stage axial compressor have been observed. The excitation is aerodynamically caused and associated with a unsteady flow field, including sound field. In order to investigate the characteristics of sound field in the axial compressor, the noise inner compressor casing are measured simultaneously with the vibration of the rotor blades on a high pressure compressor component rig testing. The results show that noise with specific frequency structures appear in the axial compressor under a pre-arranged structure adjustment and the specific operating conditions, and the noise spectrum characteristics are analyzed detailedly. Some influence factors such as rotating speed and corrected mass flow rate on noise characteristics are discussed emphatically. The results presented in this paper can be a reference for further understand of the characteristics of unsteady flow field and the effects of the high intensity sound waves on the rotor blades.
Axial compressor Noise Measurement Nonsynchronous vibrations (NSVs)
Yun Dong Sha Feng Tong Zhao Jia Han Xian Zhi Cui
Shenyang Aerospace University, Liaoning Key Laboratory of Digital Technology Simulation and Test Tec Shenyang Aerospace University, School of Aeroengine and Energy Engineering,Liaoning, Shenyang, 11013
国际会议
上海
英文
1816-1821
2011-10-21（万方平台首次上网日期，不代表论文的发表时间）