Flow Around a Circular Cylinder with Tangential Blowing near a Plane Boundary (2nd Report, A Study on Unsteady Characteristics) Shimpei OKAYASU, Kotar

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Flow Around a Circular Cylinder with Tangential Blowing near a Plane Boundary (2nd Report, A Study on Unsteady Characteristics) Shimpei OKAYASU, Kotaro SATO*4, Toshihiko SHAKOUCHI and Okitsugu FURUYA Department of Innovative Mechanical Engineering, Kogakuin University, 1-24-2 Nishi-Shinjyuku, Shinjyuku-ku, Tokyo, 163-8677 Japan Key Words : Jet, Tangential Blowing, Circular Cylinder, Coanda Effect, Ground Effect, Unsteady Flow, Wake Oscillation, Flow Visualization, Velocity Fluctuation

(1) Lockwood, V. E., Lift Generation on a Circular Cylinder by Tangential Blowing from Surface Slots, NASA Technical Note, D-244 (1960). (2) Dunham, J., A Theory of Circulation Control by Slot- Blowing, Applied to Circular Cylinder, Journal of Fluid Mechanics, Vol. 33, part 3, (1968), pp. 495-514. (3) Furuya, Y. and Yoshino, F., Aerodynamic Force Acting on a Circular Cylinder with Tangential Injection of Air, Transactions of the Japan Society of Mechanical Engineers, Vol. 41, No. 341 (1975), pp. 170-180. (4) Waka, R. and Yoshino, F., The Forced Reattachment of the Separated Shear Layer of a Circular Cylinder with Tangential Blowing, Transactions of the Japan Society of Mechanical Engineers, Vol. 53, No. 490 (1987), pp. 1704-1710. (5) Ueda, S. and Tanaka, H., Boundary Layer and Flow Control by Slot-Blowing Applied to a Flow Around a Circular Cylinder : 1st Report, An Experimental Study of Lift, Drag and Wake Control, Transactions of the Japan Society of Mechanical Engineers, Vol. 41, No. 350 (1975), pp. 2853-2865. (6) Ueda, S. and Tanaka, H., Boundary Layer and Flow Control by Slot-Blowing Applied to a Flow Around a Circular Cylinder, Transactions of the Japan Society of Mechanical Engineers, Vol. 42, No. 358 (1976), pp. 1770-1783. (7) Waka, R., Yoshino, F. and Nakai, K., The Effect of Tangential Blowing in a Separated Region on the Near Wake of a Circular Cylinder, Transactions of the Japan Society of Mechanical Engineers, Series B, Vol. 56, No. 521 (1990), pp. 11-20. (8) Yoshida, Y., Sato, K. and Ono, Y., Wake Oscillation of Column Wall Jet in Uniform Flow, Journal of the Japan Society for Aeronautical and Space Sciences, Vol. 54, No. 630 (2006), pp. 288-294. (9) Lockwood, V. E., Effect of Groundboard Height on the Aerodynamic Characteristics of a Lifting Circular Cylinder using Tangential Blowing from Surface Slots for Lift Generation, NASA Technical Note, D-969 (1961). (10) Ishizuka, I., Kohama, Y., Kato, T. and Yoshioka, S., Experimental Investigations on the Ground Effect Characteristics of the U-shaped and V-shaped Wing Designs for the Aero-Train, Transactions of the Japan Society of Mechanical Engineers, Series B, Vol. 72, No. 717 (2006), pp. 1228-1235. (11) Kano, I. and Yagita, M., Flow around a Rotating Circular Cylinder near a Moving Plane Wall, JSME International Journal Series B, Vol. 45, No. 2 (2002), pp. 259-268. (12) Okayasu, S., Sato, K., Shakouchi, T. and Furuya, O., Flow Around a Circular Cylinder with Tangential Blowing near a Plane Boundary : 1st Report, A Study on Fluid Force, Transactions of the Japan Society of Mechanical Engineers, Series B, Vol. 73, No. 733 (2007), pp. 1790-1797. (13) Bearman, P. W. and Zdravkovich, M. M., Flow around a Circular Cylinder near a Plane Boundary, Journal of Fluid Mechanics, Vol. 89, part 1, (1978), pp. 33-47. (14) Newman, B. G., The Deflection of Plane Jets by Adjacent Boundaries-Coanda Effect. Boundary Layer and Flow Control, (1961), pp. 232-251, Pergamon. (15) Neuendorf, R. and Wygnanski, I., On a Turbulent Wall Jet Flowing over a Circular Cylinder, Journal of Fluid Mechanics, Vol. 381(1999), pp. 1-25. (16) Yoshino, F. and Waka, R., Visualization of the Flow Around a Circular Cylinder with Tangential Injection, Report of the Faculty of Engineering, Tottori University, Vol. 8 (1977), pp. 20-30.