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Predicting Flow-Induced Acoustics at Near-Stall Conditions in an Automotive Turbocharger Compressor: A Numerical Approach (Springer Theses)

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en Limba Engleză Carte Paperback – 06 Jun 2019
This thesis offers new insights into the fluid flow behavior of automotive centrifugal compressors operating under near-stall conditions. Firstly it discusses the validation of three-dimensional computational fluid dynamics (CFD) unsteady simulations against acoustic experimental measurements using an original procedure based on plane wave pressure decomposition. It then examines the configuration of the CFD cases, highlighting the key parameters needed for a successful calculation. Moreover, it describes both the compressor mean and unsteady flow field from best-efficiency to near-surge operating points. Lastly, it provides readers with explanations of the various phenomena that arise when the mass flow rate is reduced and the compressor is driven to poor and noisy performance. Written for students, researchers and professionals who want to improve their understanding of the complex fluid flow behavior in centrifugal compressors, the thesis offers valuable practical insights into reducing the acoustic emissions of turbochargers.
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Specificații

ISBN-13: 9783319891613
ISBN-10: 3319891618
Pagini: 149
Dimensiuni: 155 x 235 mm
Greutate: 0.27 kg
Ediția: Softcover reprint of the original 1st ed. 2018
Editura: Springer
Colecția Springer
Seria Springer Theses

Locul publicării: Cham, Switzerland

Cuprins

Introduction ._Methodology for experimental validation ._ Influence of tip clearance on flow behavior and noise generation.- Sensitivity of compressor noise prediction to numerical setup._ Compressor mean flow field at near-stall conditions ._  Compressor aerocoustics at near-stall conditions .- Concluding remarks .

Textul de pe ultima copertă

This thesis offers new insights into the fluid flow behavior of automotive centrifugal compressors operating under near-stall conditions. Firstly it discusses the validation of three-dimensional computational fluid dynamics (CFD) unsteady simulations against acoustic experimental measurements using an original procedure based on plane wave pressure decomposition. It then examines the configuration of the CFD cases, highlighting the key parameters needed for a successful calculation. Moreover, it describes both the compressor mean and unsteady flow field from best-efficiency to near-surge operating points. Lastly, it provides readers with explanations of the various phenomena that arise when the mass flow rate is reduced and the compressor is driven to poor and noisy performance. Written for students, researchers and professionals who want to improve their understanding of the complex fluid flow behavior in centrifugal compressors, the thesis offers valuable practical insights into reducing the acoustic emissions of turbochargers.

Caracteristici

Awarded as an outstanding PhD thesis by Universitat Politècnica de València, Spain
Reports on a novel procedure for validating three-dimensional computational fluid dynamics (CFD) unsteady simulations
Describes important phenomena that produce poor and/or noisy compressor performance