Sound Generation in Centrifugal Compressors

Raitor, Till; Neise, W.

doi:10.2514/6.2006-2579

Cited by 6 publications

(1 citation statement)

References 3 publications

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“…Furthermore, tonal noise and buzz-saw noise (noise peaks occur at shaft rotation frequency and its harmonics) become the main noise sources in supersonic flow conditions. 12 Meanwhile, broadband noise can be obtained within the entire frequency range of interest. Several narrow bands were detected at 1.5-3.5 kHz in compression-ignition engines and at 5-7 kHz in spark-ignition engines.…”

Section: Introductionmentioning

confidence: 99%

Numerical and experimental analyses of intake silencer and its effects on turbocharger compressor performance

Liu

Cao

Yang

et al. 2019

Advances in Mechanical Engineering

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Numerical studies of a marine diesel engine intake silencer are conducted to evaluate its performance, and effects of the silencer on the turbocharger compressor performance are also discussed. The results show that the duct acoustic mode method can be used in the silencer transmission loss prediction, and the predicted noise reduction and main frequency range agree with the measurements fairly well. However, it is found that the silencer compromises the compressor performance by shortening its operating range. It is found that the static pressure on the compressor blade surface is decreased, thus the compressor total-to-total pressure ratio and isentropic efficiency are reduced. Pressure fluctuations at compressor rotor and stator inlets enhanced when a silencer is installed, which means the trend of pressure spectrum in the rotor and stator passage is changed. Compared with the results of a compressor in natural aspiration, it is found that the silencer can significantly reduce high-frequency noise. In particular, it is quite effective in tonal noise reduction. In addition, the compressor inlet noise spectrum indicates that noise radiation characteristics are different with a silencer installed.

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Section: Introductionmentioning

confidence: 99%