Noise at the mid to high flow range of a turbocharger compressor

Figurella, Neil; Dehner, Rick; Selamet, Ahmet; Tallio, K. V.; Miazgowicz, Keith; Wade, Robert

doi:10.3397/1/376229

Cited by 37 publications

(38 citation statements)

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“…Researchers refer to this noise with terms such as hiss [3] or whoosh [1,2]. Whoosh noise is commonly described as a broadband noise either in the 1 kHz -3 kHz band [1,4] or in frequencies ranging from 4 kHz to 12 kHz [2,5]. This noise is more audible when the compressor is working in near-surge conditions [1].…”

Section: Introductionmentioning

confidence: 99%

Methodology for experimental validation of a CFD model for predicting noise generation in centrifugal compressors

Broatch

Galindo

Garcia

et al. 2014

International Journal of Heat and Fluid Flow

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Centrifugal compressors working in the surge side of the map generate a broadband noise in the range of 1 to 3 kHz, named as whoosh noise. This noise is perceived at strongly downsized engines operating at particular conditions (full load, tip-in and tip-out maneuvers). A 3-dimensional CFD model of a centrifugal compressor is built to analyze fluid phenomena related to whoosh noise. A detached eddy simulation is performed with the compressor operating at the peak pressure point of 160 krpm. A steady flow rig mounted on an anechoic chamber is used to obtain experimental measurements as a means of validation for the numerical model. In-duct pressure signals are obtained in addition to standard averaged global variables. The numerical simulation provides global variables showing excellent agreement with experimental measurements. Pressure spectra comparison is performed to assess noise prediction capability of numerical model. The influence of the type and position of the virtual pressure probes is evaluated. Pressure decomposition is required by the simulations to obtain meaningful spectra. Different techniques for obtaining pressure components are analyzed. At the simulated conditions, a broadband noise in 1-3 kHz frequency band is detected in the experimental measurements. This whoosh noise is also captured by the numerical model.

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Section: Introductionmentioning

confidence: 99%

Methodology for experimental validation of a CFD model for predicting noise generation in centrifugal compressors

Broatch

Galindo

Garcia

et al. 2014

International Journal of Heat and Fluid Flow

View full text Add to dashboard Cite

show abstract

“…The bibliographic review shows that whoosh noise is commonly described as a broadband noise either in the 1 kHz-3 kHz band (Gaudé et al, 2008;Lee, Selamet, Kim, Kim, & Kim, 2009;Sevginer, Arslan, Sonmez, & Yilmaz, 2007) or in frequencies ranging from 4 kHz to 12 kHz (Figurella et al, 2012;Karim, Miazgowicz, Lizotte, & Zouani, 2013;Teng & Homco, 2009). Figurella et al (2012) pointed out that the former could be related to Diesel engines whereas the latter correspond to turbochargers installed in gasoline engines.…”

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confidence: 99%

“…Figurella et al (2012) pointed out that the former could be related to Diesel engines whereas the latter correspond to turbochargers installed in gasoline engines.…”

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confidence: 99%

“…In the literature, approaches to the understanding of the mechanism appear to be either purely experimental (Evans & Ward, 2006;Figurella et al, 2012;Teng & Homco, 2009) or essentially computational (Karim, Miazgowicz, Lizotte, & Zouani, 2013;Lee, Selamet, Kim, Kim, & Kim, 2009). The objective of this paper is to combine both techniques to attain a greater understanding of this particular phenomenon.…”

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confidence: 99%

“…Therefore, inducer rotating stall was found to be the source of the narrow band noise. Figurella et al (2012) studied the acoustic and performance characteristics of a turbocharger compressor on a steady-flow turbocharger test bench. Near choke, the compressor noise was dominated by the rotor-order frequency and its harmonics (including BPF).…”

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confidence: 99%

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Simulations and measurements of automotive turbocharger compressor whoosh noise

Broatch

Galindo

Garcia

et al. 2015

Engineering Applications of Computational Fluid Mechanics

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Turbocharger noise has become a major concern in downsized automotive engine development. In this paper, the analysis is focused on the whoosh noise produced by the compressor when it is working near surge. A centrifugal compressor has been acoustically characterized on a turbocharger test rig mounted on an anechoic chamber. Three in-duct pressure signals forming a linear array are registered in order to obtain pressure components. In this way, meaningful pressure spectra and sound intensity level (SIL) compressor maps are obtained, showing an increase of SIL in the frequency window corresponding to whoosh noise. Besides, detached eddy simulations (DES) of the centrifugal compressor flow in two operating conditions near surge are performed. Good agreement is found between the experimental measurements and the CFD solutions in terms of predicted pressure spectra. Flow analysis is used to identify patterns responsible for the different features of the pressure spectra. At the simulated conditions, rotating instabilities in the compressor diffuser and inducer cause pressure oscillations in the frequency range of whoosh noise.

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Acoustic and pressure characteristics of a ported shroud turbocompressor operating at near surge conditions

et al. 2019

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The operation of compressor at lower mass flow rates is limited by surge which is marked by large fluctuations in operational variables and accompanied by significant increase in noise. Ported shroud casing treatment is a widely used method to control the flow near unstable conditions in order to obtain a stable operation and enhance deep surge margin. The research on the acoustic effects of the ported shroud design is limited. Therefore, this paper numerically characterises the acoustic features of a turbocharger compressor with ported shroud design operating at marginal or soft surge conditions and investigates the correlation between acoustic characteristics and the spatial flow structures. The acoustic and the flow field features are analysed using spectral signatures obtained from an experimentally validated numerical model using both performance and acoustic measurements. Propagation of the frequency content through the ducts has been estimated with the aid of the beamforming and method of characteristics to enhance the content coming from the compressor. Expected acoustic phenomena such as rotating order tones and blade passing peaks are correctly identified in the modelled spectrum with the limitation to capture the specific broadband features. Hence, the numerical model can be used to further the research encompassing the impact these flow enhancement solutions have on the noise emission of the turbocharger. Inspection of the flow field shows radially exiting fluid at the ported shroud slot leading to the formation of the high-speed jets exiting the ported shroud cavity. Circumferential propagation of the stall cells is also identified in the impeller. Further inspection of the pressure field through modal decomposition implies the localisation of the energetic noise sources in the impeller downstream components. The influence of the ported shroud cavity on the acoustic characteristic of the compressor is not significant and is limited to the propagation of the tonal noise in the direction of impeller upstream.

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Noise at the mid to high flow range of a turbocharger compressor

Cited by 37 publications

References 0 publications

Methodology for experimental validation of a CFD model for predicting noise generation in centrifugal compressors

Methodology for experimental validation of a CFD model for predicting noise generation in centrifugal compressors

Simulations and measurements of automotive turbocharger compressor whoosh noise

Acoustic and pressure characteristics of a ported shroud turbocompressor operating at near surge conditions

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