Minimising Turbocharger Whoosh Noise for Diesel Powertrains

Evans, Dominic; Ward, Andrew

doi:10.4271/2005-01-2485

Cited by 55 publications

(66 citation statements)

References 3 publications

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“…Some of the presented works [1,2,3,7] postulate turbulence generation as the source of whoosh noise, but no evidence supporting this assertion is provided. Numerical simulations of centrifugal compressor flow would be helpful to gain insight of the whoosh noise phenomenon.…”

Section: Introductionmentioning

confidence: 99%

“…In the automotive industry, the development of strongly downsized engines with increased low speed torque has raised turbocharger airborne noise [1], because the compressor working line is shifted towards surge region [2].…”

Section: Introductionmentioning

confidence: 99%

“…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].…”

Section: Introductionmentioning

confidence: 99%

“…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%

“…Evans and Ward [1] studied turbocharger generated whoosh noise. The noise transmission path was analyzed and the compressor outlet hose was found to be the main source of radiated noise.…”

Section: Introductionmentioning

confidence: 99%

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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%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Evans and Ward [1] studied turbocharger generated whoosh noise. The noise transmission path was analyzed and the compressor outlet hose was found to be the main source of radiated noise.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations