한국음향학회:학술대회논문집 (Proceedings of the Acoustical Society of Korea Conference)
- 한국음향학회 2000년도 학술발표대회 논문집 제19권 2호
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- Pages.235-238
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- 2000
대형 디젤 엔진 터보차져 고주파 소음에 관한 연구
Investigation on Turbocharger Whine Noise in a Heavy-duty Diesel Engine
- Choi Sungbae (Powertrain R&D Center, Hyundai-Motor Co., Ltd.) ;
- Jeong Yong-Jin (Powertrain R&D Center, Hyundai-Motor Co., Ltd.) ;
- Yeo Seung-Dong (Powertrain R&D Center, Hyundai-Motor Co., Ltd.)
- 발행 : 2000.11.01
초록
Current diesel engines are usually equipped with turbochargers for improving fuel economy as well as meeting more stringent emission regulations. These turbochargers usually cause noise problems because they spins vey high such as 100,000 to 200,000 rpm, These noises are largely divided into whistle and whine noises. The frequency of whistle noise corresponds to their rotation speed, and the frequency of whine noise does to the multiplication of their rotation speed and the number of compressor blades. Turbocharger manufacturers developed a special type of compressor, effectively compressing air sucked from a duct; Recirculation Compressor Cover (RCC) or Map Width Enhancement (MWE). This special structure improves turbocharger's capability by expanding compressor's working area, but it seriously causes a noise problem, whine noise. There were many trials to surpress the noise occurred inside a compressor such as modification of a compressor, noise baffles or secondary measurements. However, it was currently concluded that the whine noise caused by the special compressor can not be reduced to that done by a standard compressor, and the strength difference of whine noises between the two compressors is not negligible. Thus, the standard compressor is decided to be applied to a newly developing heavy-duty diesel engine in order to resolve the turbocharger noise problem with a stiffened suction duct directly connected to a compressor.
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