Predicting flow-induced acoustics at near-stall conditions in an automotive turbocharger compressor : a numerical approach
.PUBLICATION, DISTRIBUTION, ETC
Place of Publication, Distribution, etc.
Cham
Name of Publisher, Distributor, etc.
Springer
Date of Publication, Distribution, etc.
2018
NOTES PERTAINING TO TITLE AND STATEMENT OF RESPONSIBILITY
Text of Note
Roberto Navarro Garcia
CONTENTS NOTE
Text of Note
Intro; Parts of this thesis have been published in the following journal articles:; Supervisora #x08;#x99;s Foreword; Acknowledgements; Contents; Symbols; 1 Introduction; 1.1 Motivation; 1.2 Background; 1.3 Main Objectives; 1.4 Approaches to Compute Flow-Induced Noise; 1.4.1 Direct Method; 1.4.2 Integral Method Based on Acoustic Analogy; 1.4.3 Broadband Noise Source Models; 1.4.4 Selected Approach; 1.5 Methodological Objectives; 1.6 Book Outline; References; 2 Methodology for Experimental Validation; 2.1 Introduction; 2.2 Experimental Methodology; 2.2.1 Literature Review 2.2.2 Turbocharger Noise Measurements2.2.3 Selected Methods; 2.2.4 Experimental Apparatus; 2.2.5 Compressor Map; 2.2.6 Discussion on Experiments; 2.3 Numerical Model; 2.4 Validation Methodology; 2.4.1 Global Variables; 2.4.2 Pressure Spectra; 2.4.3 Spectra of Pressure Components; 2.4.4 High Frequency Spectra; 2.5 Conclusions; References; 3 Influence of Tip Clearance on Flow Behavior and Noise Generation; 3.1 Introduction; 3.2 Literature Review; 3.3 Estimation of Actual Tip Clearance; 3.3.1 Thermal and Rotational Deformation; 3.3.2 Eccentricity Due to Shaft Motion 3.4 Tip Clearance Reduction Approach3.5 Comparison of Overall Performance and Acoustic Signatures; 3.5.1 Compressor Performance Variables; 3.5.2 Compressor Acoustic Spectra; 3.6 Flow Field Investigation; 3.7 Conclusions; References; 4 Sensitivity of Compressor Noise Prediction to Numerical Setup; 4.1 Introduction; 4.2 Wheel Rotation Approach; 4.3 Turbulence Models; 4.4 Mesh; 4.5 Solver; 4.6 Time-Step Size; 4.7 Conclusions; References; 5 Compressor Mean Flow Field at Near-Stall Conditions; 5.1 Introduction; 5.2 Literature Review; 5.3 Compressor Global Variables; 5.4 Inlet Duct and Inducer 5.5 Impeller Passages5.6 Diffuser, Volute and Outlet Duct; 5.7 Conclusions; References; 6 Compressor Aerocoustics at Near-Stall Conditions; 6.1 Introduction; 6.2 Literature Review; 6.3 Comparison of Acoustic Signatures; 6.4 Flow Field Investigation; 6.5 Conclusions; References; 7 Concluding Remarks; 7.1 Introduction; 7.2 Summary of Findings and Contributions; 7.2.1 Main Original Contributions; 7.2.2 Other Findings; 7.3 Limitations; 7.4 Suggestions for Future Studies; 7.4.1 Continuation of Research; 7.4.2 Overcoming Thesis Limitations and New Questions Arisen During the Thesis; References