Aeroacoustics characterization methodology applicable to turbocharger compressor

摘要: Turbochargers have become an important part of modern high efficient engines, and soon will be a standard component. Almost all automotive industrial diesel engines most the performance SI are equipped with turbocharger. Even though past few decades seen continuous improvement, there is still lack wide range research on acoustical behavior turbochargers. A turbocharger consists compressor which driven by exhaust turbine. Turbocharger produces frequency aerodynamic sound due to speed rotating blade. The main noise generating mechanisms in turbo-compressors tonal at blade passing frequencies, buzz-saw tip clearance noise. focus occurs pressure fluctuation that related speed. periodic time where it (BPF) its harmonics. Higher result more prominent aim this paper offer methodology characterizing based investigation turbo machinery, also has similar behavior. This study include results from commercial computational fluid dynamics (CFD) code experimental level distribution.