한국가시화정보학회:학술대회논문집
- 한국가시화정보학회 2002년도 추계학술대회 논문집
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- Pages.27-30
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- 2002
Serrated Fin Tube 후류에 대한 유동가시화 적용 및 근접후류 특성에 관한 연구
An Experimental Study of Vortex Formation of a Circular Cylinder with Serrated Fins
- 발행 : 2002.11.01
초록
An experimental study is performed to investigate the characteristics of near wake behind a circular cylinder with serrated fins using the constant temperature anemometer and through flow visualization. Previous report(Boo at al., 2001) shows that there are three different modes in vortex shedding behavior. This paper is focused on the identification of the physical reasons why the difference is occured in vortex shedding. The through flow velocity crossing fins decreases as increasing fin height and decreasing fin pitch mainly due to the flow resistence. Vortex shedding is affected strongly by velocity distribution around fin tube, especially by the velocity gradient. The velocity distribution at X/d=0.0 has lower gradient with increasing freestream velocity and fin height and decreasing fin pitch. Those differences in velocity gradients generate different vortex shedding mechanism.
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