차량용 터보차져 흡기 유동음 최적 개선

다국어 초록 (Multilingual Abstract)

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.

참고문헌 (Reference)

1 이형일, "차량용 터보차져의 소음도표 작성 및 응용" 한국소음진동공학회 20 (20): 502-509, 2010

2 Arnold, S., "Turbocharger Technologies to Meet Critical Performance Demands of Ultra-low Emissions Diesel Engine" SAE 2004

3 Park, H. I., "Reduction of an Intake Flow Noise Induced in a Vehicle Turbocharger" 90-97, 2011

4 Park, H. I., "Investigation on Engine Operation Area based on Turbocharger Noise Map" 462-467, 2010

5 Trochon, E. P., "A New Type of Silencers for Turbocharger Noise Control" SAE 11-18, 2001

6 Trochon, E. P., "A New Type of Silence for Turbocharger Noise Control" SAE 2001