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A Steady-State Based Investigation of Automotive Turbocharger Compressor Noise
Volvo Cars.
KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Industrial Engineering and Management (ITM), Centres, Competence Center for Gas Exchange (CCGEx). KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.ORCID iD: 0000-0001-7330-6965
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering.ORCID iD: 0000-0001-7898-8643
Volvo Cars.
2018 (English)In: SAE Technical Papers, SAE International , 2018, Vol. 2018-June, no JuneConference paper, Published paper (Refereed)
Abstract [en]

The challenging problem of noise generation and propagation in automotive turbocharging systems is of real interest from both scientific and practical points of view. Robust and fast steady-state fluid flow calculations, complemented by acoustic analogies can represent valuable tools to be used for a quick assessment of the problem during e.g. design phase, and a starting point for more in-depth future unsteady calculations. Thus, as a part of the initial phase of a long-term project, a steady-state Reynolds Averaged Navier-Stokes (RANS) flow analysis is carried out for a specific automotive turbocharger compressor geometry. Acoustic data are extracted by means of aeroacoustics models available within the framework of the STAR-CCM+ solver (i.e. Curle and Proudman acoustic analogies, respectively). This part of the work focuses on the discussion and comparison of the aeroacoustic models, and their suitability towards predicting flow and acoustics trends corresponding to the operating conditions investigated. However, given the unsteady nature of acoustics, the project will have to develop towards an investigation of the problem using more expensive, but more accurate, Large Eddy Simulation (LES) calculations. An entire compressor map with 80 operating conditions was simulated, yielding trends in the behaviour of the performance parameters for the analysed compressor. Detailed results calculated on the same compressor speed-line for one design and one off-design operating conditions are presented in terms of time-averaged pressure coefficient, Mach number, and acoustic power distributions. A total acoustic power map has been generated based on the outcome from the Curle and Proudman acoustic models, giving an indication of the noisiest operating conditions.

Place, publisher, year, edition, pages
SAE International , 2018. Vol. 2018-June, no June
National Category
Fluid Mechanics and Acoustics
Research subject
Engineering Mechanics
Identifiers
URN: urn:nbn:se:kth:diva-238199DOI: 10.4271/2018-01-1528Scopus ID: 2-s2.0-85050556716OAI: oai:DiVA.org:kth-238199DiVA, id: diva2:1263756
Conference
SAE 10th International Styrian Noise, Vibration and Harshness Congress: The European Automotive Noise Conference, SNVH 2018; Congress GrazSparkassenplatz 1Graz; Austria; 20 June 2018 through 22 June 2018
Note

QC 20181116

Available from: 2018-11-16 Created: 2018-11-16 Last updated: 2019-06-27Bibliographically approved

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Mihaescu, MihaiÅbom, Mats

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MechanicsCompetence Center for Gas Exchange (CCGEx)Linné Flow Center, FLOWAeronautical and Vehicle Engineering
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