后向弯曲离心叶轮在低流速下的流动稳定性研究

IF 1.3 Q2 ENGINEERING, AEROSPACE

International Journal of Turbomachinery, Propulsion and Power Pub Date : 2022-12-07 DOI:10.3390/ijtpp7040037

F. Lörcher, S. Hub, M. Sanjosé, S. Moreau

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引用次数: 0

摘要

对于后向弯曲离心风机，从设计运行点向部分负荷降低体积流量会增加噪音排放，同时降低效率。新兴噪声发射的频谱含量可以由具有几个谐波的次谐波峰来表征。基于窄带声学测量和Lattice Boltzmann数值模拟，人们寻求更深入的见解。下游非定常流动模式被确定为在这种性能恶化中发挥核心作用；并对几何流稳定方法进行了研究。

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Investigations concerning the Flow Stabilization of Backward Curved Centrifugal Impellers at Low Flow Rate

For a backward curved centrifugal fan, reducing volume flow rate from design operating point towards part load yields an increase in noise emission together with a reduction of efficiency. The spectral content of the emerging noise emission can be characterized by a subharmonic hump with several harmonics. Based on narrow-band acoustic measurements and numerical Lattice-Boltzmann simulations, a deeper insight is sought after. Downstream unsteady flow patterns are identified to play a central role in this performance deterioration; and geometrical flow stabilization means are investigated.

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来源期刊

International Journal of Turbomachinery, Propulsion and Power Engineering-Aerospace Engineering

CiteScore

2.30

自引率

21.40%

发文量

审稿时长

11 weeks