톱니형 핀이 부착된 튜브의 와유출특성 연구

DOI QR코드

DOI QR Code

부정숙;류병남;김경천
Bu, Jeong-Suk;Ryu, Byeong-Nam;Kim, Gyeong-Cheon

  • 발행 : 2001.08.01

초록

An experimental study is performed to investigate the characteristics of vortex shedding behind a circular cylinder with serrated fins using hot-wire anemometer. Strouhal numbers which are calculated using outer diameter of a circular cylinder with serrated fins are higher than that of a circular cylinder. Fin thickness and pitch are closely related with vortex shedding frequency and play increasing or decreasing vortex shedding after transient Reynolds number. Strouhal numbers using effective diameters which are proposed in this paper agree with that of a circular cylinder. After transient Reynolds number, a trend of Strouhal number can be estimated by checking the ratio of effective diameter to inner diameter.

키워드

등가직경;수력직경;유효직경;스트롤 수

참고문헌

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  2. Nakamura, Y., 1996, 'Vortex Shedding from Bluff Bodies and a Universal Strouhal Number,' Journal of Fluids and Structures, 10, pp. 159-171 https://doi.org/10.1006/jfls.1996.0011
  3. Robert, D. Blevins, 1990, Flow-Induced Vibration, 2nd edition
  4. Tamotsu Igarashi, 1986, 'Effect of Tripping Wires on the Flow around a Circular Cylinder Normal to an Airstream,' Bulletin of JSME, Vol. 29, No. 255, pp. 2917-2924