CAJ | 학술논문

以平面叶栅为试验研究对象，研究了叶片槽道气流旋涡与噪声声压级的关系。在此结果的基础上，以某发动机高压压气机零级静子叶片组成扇形试验件，在不同进口气流速度和攻角下，进行了叶片发声试验研究。得出了不同进口气流速度和攻角下，叶片出口气动噪声频谱及声压级的变化规律，认为分离区内强烈的气流脉动是其噪声产生的根源，且产生的较高能量的宽频噪声或宽频激振源会对构件产生声疲劳破坏，应引起足够重视并进行深入研究。
이평면협책위시험연구대상，연구료협편조도기류선와여조성성압급적관계。재차결과적기출상，이모발동궤고압압기궤령급정자협편조성선형시험건，재불동진구기류속도화공각하，진행료협편발성시험연구。득출료불동진구기류속도화공각하，협편출구기동조성빈보급성압급적변화규률，인위분리구내강렬적기류맥동시기조성산생적근원，차산생적교고능량적관빈조성혹관빈격진원회대구건산생성피로파배，응인기족구중시병진행심입연구。
Taking the compressor cascade as the testing research object, the relationship between the air-flow vortex of blade channels and the level of noise was investigated. On the basis of investigation results, zero-stage vanes of an aero-engine HPC were formed to sector test specimen and research on sound was carried out with different inlet airflow velocity and angle of attack. The vane outlet aerodynamic noise fre-quency spectrum and the level of noise varying with the inlet airflow velocity and angle of attack were ac-quired. It was recognized that strong airflow impulse in the separation zone was the cause of noise, at the same time the broadband noise or shock excitation source produced by airflow impulse would do acoustic fa-tigue to the construction parts that should arouse attention and deep research.