Vortex Shedding on Combined Bodies at Incidence to a Uniform Air Stream
Vortex-shedding phenomenon of the flow
around combined two bodies having various geometries and sizes has been investigated experimentally in the Reynolds
number range between 4.1x103 and 1.75x104. To see the effect
of the rotation of the bodies on the vortex shedding, the
combined bodies were rotated from 0° to 180°. The combined models have a cross section composing of a main circular cylinder and an attached circular or square cylinder. Results
have shown that Strouhal numbers for two cases were
changed considerably with the angle of incidence, while it was found to be largely independent of Reynolds number at 150. Characteristics of the vortex formation region and
location of flow attachments, reattachments, and separations
were observed by means of the flow visualizations.
Depending on the inclination angle the effects of flow
attachment, separation and reattachment on vortex-shedding phenomenon have been discussed.
[1] B. A. Fleck, "Strouhal Numbers for Flow past a Combined Circular-
Rectangular Prism," Journal of Wind Engineering and Industrial
Aerodynamics, vol. 89, 2001, pp. 751-755.
[2] Y. C. Wei and J. R. Chang, "Wake and Base-Bleed Flow Downstream of
Bluff Bodies with Different Geometry," Experimental Thermal and
Fluid Science, vol. 26, 2002, pp. 39-52.
[3] S. C. Luo and T. L. Gan, "Flow past 2 Tandem Circular-Cylinders of
Unequal Diameter," Aeronautical Journal, vol. 6, No. 953, 1992, pp.
105-114.
[4] T. Igarashi, "Characteristics of a Flow around Two Circular Cylinders of
Different Diameters Arranged in Tandem," Bulletin of the JSME, vol.
25, No. 201, 1982, pp. 349-357.
[5] T. Tsutsui, T. Igarashi, and K. Kamemoto, "Interactive Flow around two
Circular Cylinders of Different Diameters at Close Proximity.
Experiment and Numerical Analysis by Vortex Method," Journal of
Wind Engineering and Industrial Aerodynamics, vol. 69, no. 71, 1997,
pp. 279-291.
[6] Z. Gu and T. Sun, "On Interference between two Circular Cylinders in
Staggered Arrangement at High Subcritical Reynolds Numbers,"
Journal of Wind Engineering and Industrial Aerodynamics, vol. 80,
1999, pp. 287-300.
[7] Y. Nakamura, "Vortex Shedding From Bluff Bodies and a Universal
Strouhal Number," Journal of Fluids and Structures, vol. 10, 1996, pp.
159-171.
[8] Y. Nakamura, "Vortex Shedding From Bluff Bodies with Splitter
Plates," Journal of Fluids and Structures, vol. 10, 1996, pp. 147-158.
[9] Y. E. Akansu, M. Sarioglu, and T. Yavuz, "Flow Around a Rotatable
Circular Cylinder-Plate Body at Subcritical Reynolds Numbers," AIAA
Journal, vol. 42, no. 6, June 2004, pp. 1073-1080.
[10]M. Sarioglu, Y. E. Akansu, and T. Yavuz, "Flow Around a Rotatable
Square Cylinder-Plate Body", AIAA Journal, vol. 44, no. 5, May 2006,
pp. 1065-1072.
[11] G. S. West and C. J. Apelt, "The Effects of Tunnel Blockage and
Aspect Ratio on the Mean Flow Past a Circular Cylinder with Reynolds
Numbers between 104 and 105," J. Fluid Mech., vol. 114, 1982, pp. 361-
377.
[1] B. A. Fleck, "Strouhal Numbers for Flow past a Combined Circular-
Rectangular Prism," Journal of Wind Engineering and Industrial
Aerodynamics, vol. 89, 2001, pp. 751-755.
[2] Y. C. Wei and J. R. Chang, "Wake and Base-Bleed Flow Downstream of
Bluff Bodies with Different Geometry," Experimental Thermal and
Fluid Science, vol. 26, 2002, pp. 39-52.
[3] S. C. Luo and T. L. Gan, "Flow past 2 Tandem Circular-Cylinders of
Unequal Diameter," Aeronautical Journal, vol. 6, No. 953, 1992, pp.
105-114.
[4] T. Igarashi, "Characteristics of a Flow around Two Circular Cylinders of
Different Diameters Arranged in Tandem," Bulletin of the JSME, vol.
25, No. 201, 1982, pp. 349-357.
[5] T. Tsutsui, T. Igarashi, and K. Kamemoto, "Interactive Flow around two
Circular Cylinders of Different Diameters at Close Proximity.
Experiment and Numerical Analysis by Vortex Method," Journal of
Wind Engineering and Industrial Aerodynamics, vol. 69, no. 71, 1997,
pp. 279-291.
[6] Z. Gu and T. Sun, "On Interference between two Circular Cylinders in
Staggered Arrangement at High Subcritical Reynolds Numbers,"
Journal of Wind Engineering and Industrial Aerodynamics, vol. 80,
1999, pp. 287-300.
[7] Y. Nakamura, "Vortex Shedding From Bluff Bodies and a Universal
Strouhal Number," Journal of Fluids and Structures, vol. 10, 1996, pp.
159-171.
[8] Y. Nakamura, "Vortex Shedding From Bluff Bodies with Splitter
Plates," Journal of Fluids and Structures, vol. 10, 1996, pp. 147-158.
[9] Y. E. Akansu, M. Sarioglu, and T. Yavuz, "Flow Around a Rotatable
Circular Cylinder-Plate Body at Subcritical Reynolds Numbers," AIAA
Journal, vol. 42, no. 6, June 2004, pp. 1073-1080.
[10]M. Sarioglu, Y. E. Akansu, and T. Yavuz, "Flow Around a Rotatable
Square Cylinder-Plate Body", AIAA Journal, vol. 44, no. 5, May 2006,
pp. 1065-1072.
[11] G. S. West and C. J. Apelt, "The Effects of Tunnel Blockage and
Aspect Ratio on the Mean Flow Past a Circular Cylinder with Reynolds
Numbers between 104 and 105," J. Fluid Mech., vol. 114, 1982, pp. 361-
377.
@article{"International Journal of Mechanical, Industrial and Aerospace Sciences:59668", author = "T. Yavuz and Y. E. Akansu and M. Sarıoglu and M. Ozmert", title = "Vortex Shedding on Combined Bodies at Incidence to a Uniform Air Stream", abstract = "Vortex-shedding phenomenon of the flow
around combined two bodies having various geometries and sizes has been investigated experimentally in the Reynolds
number range between 4.1x103 and 1.75x104. To see the effect
of the rotation of the bodies on the vortex shedding, the
combined bodies were rotated from 0° to 180°. The combined models have a cross section composing of a main circular cylinder and an attached circular or square cylinder. Results
have shown that Strouhal numbers for two cases were
changed considerably with the angle of incidence, while it was found to be largely independent of Reynolds number at 150. Characteristics of the vortex formation region and
location of flow attachments, reattachments, and separations
were observed by means of the flow visualizations.
Depending on the inclination angle the effects of flow
attachment, separation and reattachment on vortex-shedding phenomenon have been discussed.", keywords = "Bluff body, vortex shedding, flow separation, flow reattachment", volume = "3", number = "5", pages = "583-5", }