한국유체기계학회 논문집 (The KSFM Journal of Fluid Machinery)

한국유체기계학회 (Korean Society for Fluid machinery)
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Arc-Groove를 가진 D-형상 물체 주위 유동에 관한 연구

A Study on the Flow around a D-shape Bluff Body with Arc-Groove

  • 서성호 (한국과학기술정보연구원) ;
  • 남청도 (한국해양대학교 기관공학부) ;
  • 이형우 (중원대학교 메카트로닉스학과) ;
  • 홍철현 (부산대학교 기계설계전산화인력양성센터)
  • Seo, Seong-Ho (Division of Marine Engineering, Korea Maritime and Ocean University) ;
  • Nam, Chung-Do (Korea Institude of Science and Technology Information) ;
  • Lee, Hyoung-Woo (Department of Mechatronics Engineering, Jungwon University) ;
  • Hong, Cheol-Hyun (Pusan Educational Center of Cpmputer Aided Machine Design)
  • 투고 : 2013.12.05
  • 심사 : 2014.09.13
  • 발행 : 2014.12.01
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초록

Object of this study is to see whether the arc-groove on a D-shape bluff body effects the drag reduction or not. To this end, the changes of the boundary layer on the surface of the object, the downstream flow field and wake flow were found by experiments. The experiments are conducted by changing number and depth of the groove, angle of the first groove and Reynolds number(Re). Groove did not effect on the surface in the downstream boundary layer of the object and was minimal impact on the time mean velocity recovery of the wake flow. Also the effects of Groove did not have a significant impact on the structure of the wake and the wake frequency. Therefore it is found that the arc-groove of the drag reduction effect on the D-shape bluff body was smaller.

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참고문헌

  1. Bearman, P. W. and Trueman, D. M., 1972, "An Investigation of the Flow around Rectangular Cylinders," aeronautic, Vol. 23, pp. 229-237.
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  3. 노기덕, 박지태, 2002, "표면에 정방형 딤플을 가진 원주의항력저감 특성," 한국박용기관학회지, Vol. 26, No. 2, pp. 233-239.
  4. Takeyoshi, K. and Michihisa, T., 1991, "Fluid dynamic effects of grooves on circular cylinder surface," AIAA Journal, Vol. 29, pp. 2062-2068. https://doi.org/10.2514/3.10842
  5. Shinichi, T., Takuya, S. and Katsumi, A., 2004, "Drag Reduction Mechanism of a Circular Cylinder by Arc Grooves," Transactions of JSME B, Vol. 70, No. 697, pp. 2363-2370. https://doi.org/10.1299/kikaib.70.2363
  6. Robarge, T. W. and Stark, A. M., 2004, "Design Considerations for Using Indented Surface Treatments to Control Boundary Layer Separation," 42nd AIAA Aerospace Sciences Meeting and Exhibit, AIAA 2004-425.
  7. Suresh1, V., Prasad1, R. A., Pillai, S. N. and Kumar, C. S., 2012, "Influence of surface roughness on drag and flow field of D-shape model," VI National Conference on Wind Engineering.

피인용 문헌

  1. 2014년 유체공학일반 분야 연구동향 vol.18, pp.2, 2014, https://doi.org/10.5293/kfma.2015.18.2.096