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首页> 外文会议>Korean Society of Noise & Vibration Control;Institute of Noise Control Engineering;International congress and exposition on noise control engineering;ASME Noise Control & Acoustics Division >An application of the acoustic similarity law to the numerical analysis of centrifugal fan noise
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An application of the acoustic similarity law to the numerical analysis of centrifugal fan noise

机译：声相似律在离心风机噪声数值分析中的应用

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摘要

Centrifugal fans, which are frequently used in our daily lives and various industries, usuallymake severe noise problems. Generally, the centrifugal fan noise consists of tones at the bladepassing frequency and its higher harmonics. These tonal sounds come from the interactionbetween the flow discharged from the impeller and the cutoff in the casing. Prediction of thenoise from a centrifugal fan becomes more necessary to optimize the design to meet both theperformance and noise criteria. However, only some limited studies on noise predictionmethod exist because there are difficulties in obtaining detailed information about the flowfield and casing effect on noise radiation. This paper aims to investigate the noise generationmechanism of a centrifugal fan and to develop a prediction method for the unsteady flow andacoustic pressure fields. In order to do this, a numerical analysis method using acousticsimilarity law is proposed, and it is verified that the method can predict the noise generationmechanism very well by comparing the predicted results with available experimental results.
机译：在我们的日常生活和各种行业中经常使用的离心风扇通常会产生严重的噪音问题。通常，离心风扇噪声由叶片通过频率处的音调及其较高的谐波组成。这些音调来自叶轮排出的流量与机壳中的切口之间的相互作用。为了优化设计以满足性能和噪声标准，从离心风扇预测噪声变得更加必要。但是，由于很难获得有关流场和套管对噪声辐射的影响的详细信息，因此对噪声预测方法的研究很少，仅存在一些有限的研究。本文旨在研究离心风机的噪声产生机理，并提出一种对非定常流动和声压场的预测方法。为此，提出了一种利用声相似律的数值分析方法，并通过将预测结果与现有的实验结果进行比较，证明该方法可以很好地预测噪声的产生机理。

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