Predicting Flow Induced Acoustics At Near Stall Conditions In An Automotive Turbocharger Compressor

Author : Roberto Navarro García
Publisher : Springer
Page : 149 pages
File Size : 54,5 Mb
Release : 2018-01-10
Category : Technology & Engineering
ISBN : 9783319722481

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Predicting Flow-Induced Acoustics at Near-Stall Conditions in an Automotive Turbocharger Compressor by Roberto Navarro García Pdf

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.

Author : Hung Nguyen-Schäfer
Publisher : Springer Science & Business Media
Page : 136 pages
File Size : 51,6 Mb
Release : 2013-01-06
Category : Technology & Engineering
ISBN : 9783642350702

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Aero and Vibroacoustics of Automotive Turbochargers by Hung Nguyen-Schäfer Pdf

Aero and Vibroacoustics of Automotive Turbochargers is a topic involving aspects from the working fields of thermodynamics of turbomachinery, aerodynamics, rotordynamics, and noise propagation computation. In this broadly interdisciplinary subject, thermodynamics of turbomachinery is used to design the turbocharger and to determine its operating conditions. Aerodynamics is needed to study the compressor flow dynamics and flow instabilities of rotating stall and surge, which can produce growling and whining-type noises. Rotordynamics is necessary to study rotor unbalance and self-excited oil-whirl instabilities, which lead to whistling and constant tone-type noises in rotating floating oil-film type bearings. For the special case of turbochargers using ball bearings, some high-order harmonic and wear noises also manifest in the rotor operating range. Lastly, noise propagation computation, based on Lighthill’s analogy, is required to investigate airborne noises produced by turbochargers in passenger vehicles. The content of this book is intended for advanced undergraduates, graduates in mechanical engineering, research scientists and practicing engineers who want to better understand the interactions between these working fields and the resulting impact on the interesting topic of Aero and Vibroacoustics of Automotive Turbochargers.

Author : Anonim
Publisher : Unknown
Page : 1042 pages
File Size : 40,6 Mb
Release : 1999
Category : Aeronautics
ISBN : STANFORD:36105021810408

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International Aerospace Abstracts by Anonim Pdf

Author : IMechE
Publisher : Elsevier
Page : 376 pages
File Size : 55,7 Mb
Release : 2016-06-15
Category : Technology & Engineering
ISBN : 9781845697099

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8th International Conference on Turbochargers and Turbocharging by IMechE Pdf

Building on the success of an established series of successful conferences held every four years since 1978, 8th International Conference on Turbochargers and Turbocharging presents the latest technologies relating to engine pressure charging systems from international industry and academic experts in the field, covering new developments in compressors and novel intake systems; Improved models for cycle simulation; Electro boost systems; Industry trends and requirements; Turbines and mechanical aspects such as thermomechanical analysis, dynamics, and axial load capacity. Discusses the latest technologies relating to engine pressure charging systems Looks at mechanical aspects such as thermomechanical analysis, dynamics, and axial load capacity

Author : Michael Casey,Chris Robinson
Publisher : Cambridge University Press
Page : 789 pages
File Size : 46,9 Mb
Release : 2021-06-10
Category : Science
ISBN : 9781108416672

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Radial Flow Turbocompressors by Michael Casey,Chris Robinson Pdf

An introduction to the theory and engineering practice that underpins the component design and analysis of radial flow turbocompressors. Drawing upon an extensive theoretical background and years of practical experience, the authors provide descriptions of applications, concepts, component design, analysis tools, performance maps, flow stability, and structural integrity, with illustrative examples. Features wide coverage of all types of radial compressor over many applications unified by the consistent use of dimensional analysis. Discusses the methods needed to analyse the performance, flow, and mechanical integrity that underpin the design of efficient centrifugal compressors with good flow range and stability. Includes explanation of the design of all radial compressor components, including inlet guide vanes, impellers, diffusers, volutes, return channels, de-swirl vanes and side-streams. Suitable as a reference for advanced students of turbomachinery, and a perfect tool for practising mechanical and aerospace engineers already within the field and those just entering it.

Author : Rene Van den Braembussche
Publisher : John Wiley & Sons
Page : 418 pages
File Size : 52,5 Mb
Release : 2019-04-08
Category : Technology & Engineering
ISBN : 9781119424093

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Design and Analysis of Centrifugal Compressors by Rene Van den Braembussche Pdf

A comprehensive overview of fluid dynamic models and experimental results that can help solve problems in centrifugal compressors and modern techniques for a more efficient aerodynamic design. Design and Analysis of Centrifugal Compressors isacomprehensive overview of the theoretical fluid dynamic models describing the flow in centrifugal compressors and the modern techniques for the design of more efficient centrifugal compressors. The author — a noted expert in the field, with over 40 years of experience — evaluates relevant numerical and analytical prediction models for centrifugal compressors with special attention to their accuracy and limitations. Relevant knowledge from the last century is linked with new insights obtained from modern CFD. Emphasis is to link the flow structure, performance and stability to the geometry of the different compressor components. Design and Analysis of Centrifugal Compressors is an accessible resource that combines theory with experimental data and previous research with recent developments in computational design and optimization. This important resource Covers the basic information concerning fluid dynamics that are specific for centrifugal compressors and clarifies the differences with axial compressors Provides an overview of performance prediction models previously developed in combination with extra results from research conducted by the author Describes helpful numerical and analytical models for the flow in the different components in relation to flow stability, operating range and performance Includes the fundamental information for the aerodynamic design of more efficient centrifugal compressors Explains the use of computational fluid dynamics (CFD) for the design and analysis of centrifugal compressors Written for engineers, researchers and designers in industry as well as for academics specializing in the field, Design and Analysis of Centrifugal Compressors offers an up to date overview of the information needed for the design of more effective centrifugal compressors.

Author : Anonim
Publisher : Unknown
Page : 1126 pages
File Size : 41,5 Mb
Release : 1987
Category : Aeronautics
ISBN : UIUC:30112075701596

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Scientific and Technical Aerospace Reports by Anonim Pdf

Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.

Author : Steffen Marburg,Bodo Nolte
Publisher : Springer Science & Business Media
Page : 584 pages
File Size : 45,7 Mb
Release : 2008-02-27
Category : Science
ISBN : 9783540774488

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Computational Acoustics of Noise Propagation in Fluids - Finite and Boundary Element Methods by Steffen Marburg,Bodo Nolte Pdf

The book provides a survey of numerical methods for acoustics, namely the finite element method (FEM) and the boundary element method (BEM). It is the first book summarizing FEM and BEM (and optimization) for acoustics. The book shows that both methods can be effectively used for many other cases, FEM even for open domains and BEM for closed ones. Emphasis of the book is put on numerical aspects and on treatment of the exterior problem in acoustics, i.e. noise radiation.

Author : Anonim
Publisher : Unknown
Page : 410 pages
File Size : 44,5 Mb
Release : 1989
Category : Mechanics, Applied
ISBN : OSU:32435026160705

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Applied Mechanics Reviews by Anonim Pdf

Author : Anonim
Publisher : Unknown
Page : 712 pages
File Size : 42,5 Mb
Release : 1993
Category : Aeronautics
ISBN : STANFORD:36105012119850

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Aeronautical Engineering by Anonim Pdf

A selection of annotated references to unclassified reports and journal articles that were introduced into the NASA scientific and technical information system and announced in Scientific and technical aerospace reports (STAR) and International aerospace abstracts (IAA)

Author : Harvey H. Hubbard
Publisher : Unknown
Page : 620 pages
File Size : 49,9 Mb
Release : 1991
Category : Aerodynamic noise
ISBN : STANFORD:36105024722329

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Aeroacoustics of Flight Vehicles by Harvey H. Hubbard Pdf

Author : Bernhard Stoevesandt,Gerard Schepers,Peter Fuglsang,Yuping Sun
Publisher : Springer Nature
Page : 1495 pages
File Size : 40,9 Mb
Release : 2022-08-04
Category : Technology & Engineering
ISBN : 9783030313074

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Handbook of Wind Energy Aerodynamics by Bernhard Stoevesandt,Gerard Schepers,Peter Fuglsang,Yuping Sun Pdf

This handbook provides both a comprehensive overview and deep insights on the state-of-the-art methods used in wind turbine aerodynamics, as well as their advantages and limits. The focus of this work is specifically on wind turbines, where the aerodynamics are different from that of other fields due to the turbulent wind fields they face and the resultant differences in structural requirements. It gives a complete picture of research in the field, taking into account the different approaches which are applied. This book would be useful to professionals, academics, researchers and students working in the field.

Author : Anonim
Publisher : Unknown
Page : 706 pages
File Size : 46,5 Mb
Release : 1993
Category : Electronic
ISBN : NASA:31769000659360

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Aeronautical Engineering: A Cumulative Index to a Continuing Bibliography (supplement 287) by Anonim Pdf

Author : Anonim
Publisher : Unknown
Page : 2264 pages
File Size : 55,9 Mb
Release : 1992
Category : Engineering
ISBN : MINN:31951D00772319T

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The Engineering Index Annual by Anonim Pdf

Since its creation in 1884, Engineering Index has covered virtually every major engineering innovation from around the world. It serves as the historical record of virtually every major engineering innovation of the 20th century. Recent content is a vital resource for current awareness, new production information, technological forecasting and competitive intelligence. The world?s most comprehensive interdisciplinary engineering database, Engineering Index contains over 10.7 million records. Each year, over 500,000 new abstracts are added from over 5,000 scholarly journals, trade magazines, and conference proceedings. Coverage spans over 175 engineering disciplines from over 80 countries. Updated weekly.

Author : Institution of Mechanical Engineers
Publisher : CRC Press
Page : 390 pages
File Size : 48,9 Mb
Release : 2020-09-30
Category : Technology & Engineering
ISBN : 9781000316773

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14th International Conference on Turbochargers and Turbocharging by Institution of Mechanical Engineers Pdf

14th International Conference on Turbochargers and Turbocharging addresses current and novel turbocharging system choices and components with a renewed emphasis to address the challenges posed by emission regulations and market trends. The contributions focus on the development of air management solutions and waste heat recovery ideas to support thermal propulsion systems leading to high thermal efficiency and low exhaust emissions. These can be in the form of internal combustion engines or other propulsion technologies (eg. Fuel cell) in both direct drive and hybridised configuration. 14th International Conference on Turbochargers and Turbocharging also provides a particular focus on turbochargers, superchargers, waste heat recovery turbines and related air managements components in both electrical and mechanical forms.