본문 바로가기
HOME> 논문 > 논문 검색상세

논문 상세정보

KSME international journal v.17 no.6, 2003년, pp.925 - 934   피인용횟수: 1

The Effect of Serrated Fins on the Flow Around a Circular Cylinder

Boo, Jung-Sook   (School of Mechanical Engineering, Pusan National UniversityUU0000613  ); Ryu, Byong-Nam   (School of Mechanical Engineering, Pusan National UniversityUU0000613  ); Kim, Kyung-Chun   (School of Mechanical Engineering, Pusan National UniversityUU0000613  );
  • 초록

    An experimental study is performed to investigate the characteristics of near wake flow behind a circular cylinder with serrated fins using a constant temperature anemometer and flow visualization. Various vortex shedding modes are observed. Fin height and pitch are closely related to the vortex shedding frequency after a certain transient Reynolds number. The through velocity across the fins decreases with increasing fin height and decreasing fin pitch. Vortex shedding is affected strongly by the velocity distribution just on top of the finned tube. The weaker gradient of velocity distribution is shown as increasing the freestream velocity and the fin height, while decreasing the fin pitch. The weaker velocity gradient delays the entrainment flow and weakens its strength. As a result of this phenomenon, vortex shedding is decreased. The effective diameter is defined as a virtual circular cylinder diameter taking into account the volume of fins, while the hydraulic diameter is proposed to cover the effect of friction by the fin surfaces. The Strouhal number based upon the effective diameters seems to correlate well with that of a circular cylinder without fins. After a certain transient Reynolds number, the trend of the Strouhal number can be estimated by checking the ratio of effective diameter to inner diameter. The normalized velocity and turbulent intensity distributions with the hydraulic diameter exhibit the best correlation with the circular cylinder's data.


  • 주제어

    Equivalent Diameter .   Hydraulic Diameter .   Effective Diameter .   Vortex Formation Region .   Vortex Shedding .   Strouhal Number.  

  • 참고문헌 (10)

    1. Stock, D. E., Wells, M. R., Barriga, A. and Crowe, C. T., 1977, 'Application of Split-Film Anemometry to Low-Speed with High Turbulence Intensity and Recirculation as Found in Electrostatic Precipitators,' Proc. Fifth Biennial Symp. on Turbulence(University of Missouri), pp. 117-123 
    2. Lee, S. J. and Daichin, 2001, 'Flow Structrure of the Wake behind an Elliptic Cylinder Close to a Free Surface,' KSME International Journal, Vol. 15, No. 12, pp. 1784-1793 
    3. Stock, David E. and Jaballa,Tuhami M., 1985, 'Turbulence Measurement Using Split-Film Anemometry,' Proc. Int. Symp. on Refined Flow Modeling and Tubulence Measurement(University of Iowa), H15-1-10 
    4. Griffin, Owen M., 1995, 'A Note on BluffBody Vortex Formation,' J. Fluid Mech., Vol. 284, pp. 217-224 
    5. Kim, K. C. and Jung, Y. B., 1991, 'The Effect of Free Stream Tubulence of the Near Wake behind a Circular Cylinder,' Transactions of the KSME, Vol. 15, No. 6, pp. 2062-2072     
    6. Kim, S. J. and Lee, C. M., 2002, 'Numerical Investigation of Cross-Flow Around a Circular Cylinder at a Low-Reynolds Number Flow Under an Electromagnetic Force,' KSME International Journal, Vol. 16, No. 3, pp. 363-375     
    7. Gerrard, J. H., 1966, 'The Mechanics of the Formation Region of Vortices behind Bluff Bodies,' J. Fluid Mech. Vol. 25, Part 2, pp. 401-413 
    8. Green, R. B. and Gerrard, J. H., 1993, 'Vorticity Measurements in the Near Wake of a Circular Cylinder at Low Reynolds Numbers,' J. Fluid Mech. Vol. 246, pp. 675-691 
    9. Apelt, C. J., West, G. S. and Szewczyk, A. A., 1973, 'The Effects of Wake Splitter Plates on the Flow Past a Circular Cylinder in the Range $10^4,' J. Fluid Mechl., Vol. 61, Part 1, pp. 187-198 
    10. Chang, Paul K., 1979, Separation of Flow, Pochinchai Printing Co.,Ltd., Korea, pp. 11-18 
  • 이 논문을 인용한 문헌 (1)

    1. 2004. "" KSME international journal, 18(12): 2236~2249     

 저자의 다른 논문

  • 부정숙 (29)

    1. 1985 "2次元 亂流 Stepped Wall Jet 의 流動特性" 大韓機械學會論文集 9 (6): 732~742    
    2. 1985 "圓柱 뒤의 2 次元 後流 流動 特性" 大韓機械學會論文集 9 (5): 555~563    
    3. 1989 "일렬관군에서의 난류 후류특성에 관한 연구" 大韓機械學會論文集 13 (5): 1023~1031    
    4. 1990 "일행관군에서의 유동특성과 열전달현상에 관한 연구" 大韓機械學會論文集 14 (6): 1603~1612    
    5. 1990 "장방형주 후류의 2차원 난류특성" 韓國舶用機關學會誌 = Journal of the Korean Society of Marine Engineers 14 (1): 62~71    
    6. 1991 "원주 주위의 비정상 층류유동과 열전달에 대한 수치해석" 韓國舶用機關學會誌 = Journal of the Korean Society of Marine Engineers 15 (2): 64~72    
    7. 1992 "회전하는 원주후류의 2차원 난류구조" 韓國舶用機關學會誌 = Journal of the Korean Society of Marine Engineers 16 (4): 39~49    
    8. 1994 "균일한 전단류에 놓인 각주 후류의 난류구조" 韓國舶用機關學會誌 = Journal of the Korean Society of Marine Engineers 18 (1): 101~113    
    9. 1996 "박리 유선의 곡률 변화가 축대칭 후향계단 흐름에 미치는 영향" 大韓機械學會論文集. Transactions of the Korean Society of Mechanical Engineers. B. B 20 (4): 1510~1520    
    10. 1996 "원통내부의 음향여기에 의한 와류유출제어" 大韓機械學會論文集. Transactions of the Korean Society of Mechanical Engineers. B. B 20 (5): 1649~1660    
  • 류병남 (11)

  • 김경천 (70)

 활용도 분석

  • 상세보기

    amChart 영역
  • 원문보기

    amChart 영역

원문보기

무료다운로드
  • NDSL :
유료다운로드

유료 다운로드의 경우 해당 사이트의 정책에 따라 신규 회원가입, 로그인, 유료 구매 등이 필요할 수 있습니다. 해당 사이트에서 발생하는 귀하의 모든 정보활동은 NDSL의 서비스 정책과 무관합니다.

원문복사신청을 하시면, 일부 해외 인쇄학술지의 경우 외국학술지지원센터(FRIC)에서
무료 원문복사 서비스를 제공합니다.

NDSL에서는 해당 원문을 복사서비스하고 있습니다. 위의 원문복사신청 또는 장바구니 담기를 통하여 원문복사서비스 이용이 가능합니다.

이 논문과 함께 출판된 논문 + 더보기