Publisher : The Korean Society for Noise and Vibration Engineering
DOI : 10.5050/KSNVE.2015.25.8.546
Title & Authors
Optimization of an Intake Flow Noise Induced from an Automotive Turbocharger Park, Hoil; Choi, Sungbae; Jang, Seongsik; Hwang, Junyoung;
In the previous study, the air flow noise around 1.6 k~1.8 kHz was analyzed, and could be reduced by machining a groove in the bore of compressor inlet in front of the main blades of a compressor wheel. It was proven that this groove was very effective for removing the noise without critical sacrifice of compressor performance, and in addition, it did not noticeably deteriorate vehicle performance, drivability and acceleration. It is interesting that the type of groove tried for 1.6~1.8 kHz noise reduction could be effective for another air flow noise, 4 k~6 kHz which is the 3rd order frequency range of turbocharger speed. This study tried various shapes of grooves for minimizing engine performance difference as well as reducing the 3rd order noise. Finally, it was shown that the groove should be round for the engine performance, and an optimal size exist for the noise and the engine performance.
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