유체기계공업학회:학술대회논문집
- 유체기계공업학회 2006년 제4회 한국유체공학학술대회 논문집
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- Pages.195-198
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- 2006
고정된 분포 분사/흡입을 통한 채널 유동의 저항 감소
Drag reduction in channel flow using stationary distributed blowing and suction
초록
The possibility of skin friction reduction in laminar channel flow is investigated when the flow is subjected to stationary distributed surface blowing and suction. Blowing and suction provided at the channel walls is steady in time but varies as a sine function along the streamwise direction. The skin friction changes depending on the wavelength and amplitude of the actuation. Especially, the skin friction is reduced below that of fully developed laminar flow as the wavelength decreases and amplitude increases. The optimal wavelength of producing minimum skin friction is