PIV를 이용한 펜스를 가진 정방형주 주위의 유동장 가시화
The Visualization of the Flowfield around Square Prism Having Fences Using the PIV
2
조회
0
다운로드
8
인용
0
참고문헌
키워드
초록
The characteristics of the flowfield of a square prism having fences on the corner was investigated by the PIV. Strouhal numbers, velocity vectors and velocity profiles around the square prism were observed at various positions of the fences, and Reynolds number of Re=0.6×104~1.0×104. As the results in case of the prism having fences the Strouhal numbers were all smaller than in case of the prototype prism. In case of the prism having vertical fences on the front corners the concentrated intensity of the vorticity was the strongest and the size of separated shear layer was the largest. While in case of the prism having vertical fences on the rear corners the concentrated intensity of the vorticity was the weakest and the size of separated shear layer was the smallest. Also in this case, the flow separated in front corner was reattached around the rear corner and made circulation.
Abstract
The characteristics of the flowfield of a square prism having fences on the corner was investigated by the PIV. Strouhal numbers, velocity vectors and velocity profiles around the square prism were observed at various positions of the fences, and Reynolds number of Re=0.6×104~1.0×104. As the results in case of the prism having fences the Strouhal numbers were all smaller than in case of the prototype prism. In case of the prism having vertical fences on the front corners the concentrated intensity of the vorticity was the strongest and the size of separated shear layer was the largest. While in case of the prism having vertical fences on the rear corners the concentrated intensity of the vorticity was the weakest and the size of separated shear layer was the smallest. Also in this case, the flow separated in front corner was reattached around the rear corner and made circulation.
참고문헌 (6)
- Igarashi, T., "Drag reduction of a square prism by flow control using a small rod", Journal of Wind Engineering and Industrial Aerodynamics, 69(71), pp.141~153 (1997)
- Sakamoto, H., "Suppression of fluid forces acting on a square prism by passive control", ASME Journal of Fluids Engineering, 119, pp.506~511 (1997)
- L. Zhou, "Suppression of fluid forces on a square cylinder by flow control", Journal of Fluids and Structures, 21, pp.151~167 (2005)
- Experimental and Computational Study of Unsteady Wake Flow Behind a Bluff Body with a drag Reduction Device, "Bahram Khalighi", ~, pp.SAE 2001-01-1042 (2001)
- T. Tamura, "The effect of Turbulence on aerodynamic forces on a square cylinder with various corner shapes", Journal of Wind Engineering and Industrial Aerodynamics, 83, pp.135~145 (1999)
- 노기덕, "모서리에 펜스를 가진 정방형주의 유체력저감 특성", 한국마린엔지니어링학회지, 30(4), pp.389~395 (2006), 한국마린엔지니어링학회