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首页> 外文期刊>Engineering Applications of Computational Fluid Mechanics >Investigation of Unsteady Flows and Noise in Rotor-Stator Interaction with Adjustable Lean Vane
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Investigation of Unsteady Flows and Noise in Rotor-Stator Interaction with Adjustable Lean Vane

机译：可调斜叶片静压转子间非定常流动和噪声的研究

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AbstractThe paper is a study of the noise reduction effects of the stator lean angle. Firstly, a numerical study has been carried out to investigate the unsteady characteristics of the flow induced by the rotor-stator interaction. To obtain the rotor?s wake, the distribution of the RMS pressure and the pressure disturbance coefficient, the compressor with an adjustable stator lean angle has been numerically studied. Then the compressor was experimentally tested at 11 different lean angles to obtain the free field noise spectra. Both the unsteady flow property and noise characteristics are discussed on the basis of the Computational Fluid Dynamics (CFD) results. The results indicate that (1) the pressure fluctuation of stator is the main source of the interaction noise; (2) the phase of rotor?s wake can be tuned by the lean angle of the stator; (3) the distribution of the first harmonic of tone noise decides the distribution of total Sound Pressure level (SPL); and (4) stator with positive lean angle has b...
机译：摘要本文研究了定子倾斜角的降噪效果。首先，已经进行了数值研究以研究由转子-定子相互作用引起的流动的非稳态特性。为了获得转子的尾流，RMS压力的分布和压力扰动系数，对定子倾斜角可调的压缩机进行了数值研究。然后在11个不同的倾斜角上对压缩机进行实验测试，以获得自由场噪声谱。在计算流体动力学（CFD）结果的基础上，讨论了非稳态流动特性和噪声特性。结果表明：（1）定子压力波动是相互作用噪声的主要来源。 （2）转子的尾流相位可以通过定子的倾斜角来调节; （3）音调噪声的一次谐波的分布决定了总声压级（SPL）的分布; （4）具有正倾斜角的定子具有b ...

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