Experimental acoustic characterization of automotive twin-scroll turbine

Kabral, Raimo; Nemr, Yasser El; Ludwig, Carlos; Mirlach, Robert; Koutsovasilis, Panagiotis; Masrane, A; Åbom, Mats

doi:10.29008/etc2017-363

Cited by 6 publications

(2 citation statements)

References 14 publications

(18 reference statements)

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“…Especially interesting is the contribution made by Kabral et al, 29 where an experimental methodology for performing an acoustic characterisation of the turbine with a pressure decomposition method is described, and the linear amplitude dynamic response of the twin-scroll turbine is obtained. Furthermore, the technology described in detail in Serrano et al 30 provides the flexibility to analyse the non-linear response under different conditions (hot and cold), with different amplitudes and equivalent engine points of operation separating the effects of each branch independently.…”

Section: Introductionmentioning

confidence: 99%

Experimental validation of a one-dimensional twin-entry radial turbine model under non-linear pulse conditions

Serrano

Arnau

Soler

et al. 2019

International Journal of Engine Research

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This article presents the experimental validation of a complete integrated one-dimensional twin-scroll turbine model able to be used in reciprocating internal combustion engine unsteady simulations. A passenger car with a twin-entry-type turbine has been tested under engine-like pulse conditions by means of a specifically built gas stand. To obtain high-resolution quality data, the turbine and turbine line pipes have been instrumented with mean and instantaneous pressure sensors as well as temperature and mass flow sensors, employing a uniquely designed rotating valve for the pulse generation. This experimental configuration enables to obtain the pressure decomposition in both inlets and outlets of the turbine. Using the experimental data obtained, the model is fully validated, with special focus on the reflected and transmitted components for analysing the performance of the model and its non-linear acoustics prediction capabilities. The model presents a very high degree of correlation with the experimental results, providing a range of errors similar to the uncertainty of the measurements, even in the medium- and high-frequency spectra.

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Section: Introductionmentioning

confidence: 99%

Experimental validation of a one-dimensional twin-entry radial turbine model under non-linear pulse conditions

Serrano

Arnau

Soler

et al. 2019

International Journal of Engine Research

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“…This method has been also used and validated with radial compressors, 8 demonstrating that a three-sensor-phased array BF technique is a very reliable method in the plane wave frequency range. Also twin-scroll turbines have been characterised experimentally under linear acoustic excitations, 9 or even nonlinear acoustic excitations. 10 Those experimental characterisations may be prohibitive in a very broad range of operating conditions.…”

Section: Introductionmentioning

confidence: 99%

Radial turbine sound and noise characterisation with acoustic transfer matrices by means of fast one-dimensional models

Torregrosa

García-Cuevas

Inhestern

et al. 2019

International Journal of Engine Research

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Estimating correctly the turbine acoustics can be valuable during the engine design stage; in fact, it can lead to a more optimised design of the silencer and aftertreatment, as well as to better prediction of the scavenging effects. However, obtaining the sound and noise emissions of radial turbocharger turbines with low computational costs can be challenging. To consider these effects in a time-efficient manner, the acoustic response of single-entry radial turbines can be characterised by means of acoustic transfer matrices that change with the operating conditions. Exploiting the different time-scales of the acoustic phenomena and the change in the operating point of the turbine, lookup tables of acoustic transfer matrices can be computed. Then, the obtained characterisation can be used in mean-value engine models. This article presents a method for generating these lookup tables by means of fast one-dimensional simulations of thoroughly validated fidelity, in terms of both acoustics and extrapolation capabilities. Due to the inherent behaviour of radial turbines, the number of computations needed to fill the lookup tables is relatively small, so the method can be used as a simple preprocessing phase before mean-value simulation campaigns.

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A DFT Spectrum Acoustic Analysis for Investigating Pulse Duration Effect on Performance, Psychoacoustic Sound Level of Turbocharger Turbines Through C + + FDM Code

Ketata

Driss

2022

Arab J Sci Eng

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Experimental acoustic characterization of automotive twin-scroll turbine

Cited by 6 publications

References 14 publications

Experimental validation of a one-dimensional twin-entry radial turbine model under non-linear pulse conditions

Experimental validation of a one-dimensional twin-entry radial turbine model under non-linear pulse conditions

Radial turbine sound and noise characterisation with acoustic transfer matrices by means of fast one-dimensional models

A DFT Spectrum Acoustic Analysis for Investigating Pulse Duration Effect on Performance, Psychoacoustic Sound Level of Turbocharger Turbines Through C + + FDM Code

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