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항공기 소음저감 실효성 증진방안 - 김해국제공항을 중심으로
김봉기 ( Bong-ki Kim ),이승원 ( Seung-won Lee ) 한국환경기술학회 2021 한국환경기술학회지 Vol.22 No.1
The differences in noise effects between standard flight paths and actual flight tracks notified in AIP(Aeronautical information publication) of Gimhae Airport were compared and analyzed. In order to verify the effect of noise reduction according to flight path selection, INM, which is a commercial program used to draw an aircraft noise map, was used to predict noise impact. In order to improve consistency, this study tried to minimize the error by comparison with the data of the noise monitoring network. The differences in noise effects between standard flight paths and actual flight tracks notified in AIP of Gimhae Airport were compared and analyzed. Initially, it was expected that the irregular actual flight tracks pattern would have a larger area of noise damage than the single standard flight path(listed in AIP) which has an even and regular pattern. However, the result of prediction through the INM program simulation showed that the noise impact(surface area, number of houses, etc.) by a single standard flight path was greater.
김봉기(Kim, Bong-Ki),김상렬(Kim, Sang-Ryul),김현실(Kim, Hyun-Sil),신민철(Shin, Min-Chol) 한국소음진동공학회 2008 한국소음진동공학회 논문집 Vol.18 No.12
A muffler design in the exhaust system is critical to provide fur low noise in shipboard spaces. In an attempt to effectively design the low noise muffler, it Is important to evaluate the performance of the muffler considering not only the noise, but also pressure drop as well. For this purpose, a test system of large exhaust mufflers fur ship propulsion systems was designed based on ISO 7235. The substitution test fur determining both the insertion loss and pressure drop of mufflers was carried out. A ship exhaust muffler is considered as a test example and the insertion loss and pressure drop were obtained.