CAJ | 학술논문

基于某型多级轴流压气机部件试验，主要研究高压一级转子叶片出现高振幅级叶片振动时，压气机流道内部的噪声特性，重点分析换算流量(ma)的变化和静子导流叶片连动角度(S0)的变化对压气机内部噪声信号的影响。分析结果表明，此现象可能与压气机环形空间中的声共振有关，压气机中发生的所有共振都在一个频率下，即声共振频率呈现锁频现象；此外，谐振最大时，声共振频率处的声能量超过了通常较大的叶片通过频率处的声能量，在整个声压级谱中占主导地位；ma 和S0的变化对声共振频率不产生影响，但ma 和S0的变化对压气机内部噪声信号特征和转子叶片振动应力幅值影响较大。研究结果对进一步研究声共振现象有一定的参考价值。
기우모형다급축류압기궤부건시험，주요연구고압일급전자협편출현고진폭급협편진동시，압기궤류도내부적조성특성，중점분석환산류량(ma)적변화화정자도류협편련동각도(S0)적변화대압기궤내부조성신호적영향。분석결과표명，차현상가능여압기궤배형공간중적성공진유관，압기궤중발생적소유공진도재일개빈솔하，즉성공진빈솔정현쇄빈현상；차외，해진최대시，성공진빈솔처적성능량초과료통상교대적협편통과빈솔처적성능량，재정개성압급보중점주도지위；ma 화S0적변화대성공진빈솔불산생영향，단ma 화S0적변화대압기궤내부조성신호특정화전자협편진동응력폭치영향교대。연구결과대진일보연구성공진현상유일정적삼고개치。
Based on a certain type of a multi-stage axial compressor rig testing,the characteristics of noise in the compressor passage compressor is investigated under the condition that blade vibrations of high amplitude levels occurred to the first rotor blades of high pressure. And the analysis focuses on the effect of the changes of the corrected mass flow( ma ) and the linkage angle of stator guide vane ( S0 ) on the noise signal in the compressor. The results show thatthis phenomenon is associated with acoustic resonance of the compressor annulus space,and the resonance occurring all over the compressor is under one single frequency,which means that the acoustic frequency locking takes place. In addition,the sound energy of the acoustic resonance frequency exceeds that of the usually dominated blade passing that frequency when the amplitude of blade vibrations reaches the maximum,which dominates in the whole sound pressure level spectrum. The acoustic resonance frequency is unaffected by and,but the changes of ma and S0 have significant influence on internal noise signal characteristics in the compressor and the vibration stress amplitude of rotor blades. These results have a certain reference for further study of acoustic resonance.