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이덕영(Dug-Young Lee),윤정환(Jong-Hwan Yoon),김상곤(Sang-Kon Kim),주용운(Yong-Woon Joo),김창호(Chang-Ho Kim),장재홍(Jae-Hong Jang),김환태(Hwan-Tae Kim) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
Passenger cars with sunroofs sometimes experience a low frequency noise called "wind throb" and a high frequency called "turbulence noise" when travelling with the sunroof open. These noise should be suppressed because it is an unpleasant noise which can adversely affect the acoustic environment inside a car. It is useful to suppress the wind noise if the height of a wind deflector can be adjusted variably in a proper position depending on the driving speed and the sunroof opening width, because it is always sprung out to a fixed height at the front edge of sunroof when opened. In this study, a variable sunroof wind deflector was developed and verified by road test and durability test. The deflector's optimal basic sectional shape and variable height according to sunroof opening width were determined by CFD analysis.