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引用次数: 0
摘要
在多级高压压缩机中进行了一项实验,以研究噪声和转子叶片振动。当转子叶片发生高振幅振动时,压缩机内部会发出高强度的声音。压缩机内部噪声的振幅随叶片振动振幅的变化而变化,其变化规律是一致的。因此,建立了一个环形盘腔模型,即高压压缩机转子和定子之间的简化腔体,通过数值模拟研究压缩机内的高强度声。模型捕捉了腔内涡旋结构的运动过程。环形盘腔模型的声模在 Ma 0.2 时被激发,同时腔内声压具有明显的圆周二阶形式。内部声压沿径向逐渐增大。同时,建立了环形盘腔结构进行实验研究。模拟和实验得出的环形盘腔结构的声模特征是一致的。
Experimental and numerical study of high-intensity sound in the cavity between rotator and stator of high- pressure compressor
An experiment is conducted in a multistage high-pressure compressor to investigate noise and rotor blade vibration. When vibration with high amplitude occurs in the rotor blade, high-intensity sound occurs within the compressor. The amplitude of noise inside the compressor varies with the amplitude of blade vibration, and the variation laws are consistent. Therefore, an annular disk cavity model, the simplified cavity between the rotator and stator of a high-pressure compressor, is built to study the high-intensity sound in the compressor by numerical simulation. The motion processes of the vortex structure inside the cavity are captured. The acoustic mode of the annular disk cavity model is excited at Ma 0.2, at the same time the sound pressure in the cavity is characterized with obvious a form of circumferential second order. The internal sound pressure gradually increases along the radial direction. Meanwhile, an annular disk cavity structure is established for experimental study. The characteristics of the acoustic mode of the annular disk cavity structure obtained in the simulation and experiment are consistent.
期刊介绍:
International Journal of Aeroacoustics is a peer-reviewed journal publishing developments in all areas of fundamental and applied aeroacoustics. Fundamental topics include advances in understanding aeroacoustics phenomena; applied topics include all aspects of civil and military aircraft, automobile and high speed train aeroacoustics, and the impact of acoustics on structures. As well as original contributions, state of the art reviews and surveys will be published.
Subtopics include, among others, jet mixing noise; screech tones; broadband shock associated noise and methods for suppression; the near-ground acoustic environment of Short Take-Off and Vertical Landing (STOVL) aircraft; weapons bay aeroacoustics, cavity acoustics, closed-loop feedback control of aeroacoustic phenomena; computational aeroacoustics including high fidelity numerical simulations, and analytical acoustics.