Volume 24 Issue 6
Jun.  1998
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Dong Yufei. Nonlinear Behavior of Separated Shear Layer of a Blunt Circular Cylinder[J]. Journal of Beijing University of Aeronautics and Astronautics, 1998, 24(6): 638-641. (in Chinese)
Citation: Dong Yufei. Nonlinear Behavior of Separated Shear Layer of a Blunt Circular Cylinder[J]. Journal of Beijing University of Aeronautics and Astronautics, 1998, 24(6): 638-641. (in Chinese)

Nonlinear Behavior of Separated Shear Layer of a Blunt Circular Cylinder

  • Received Date: 26 Jun 1998
  • Publish Date: 30 Jun 1998
  • Dynamical evolution process of separated shear layer of a blunt circular cylinder,and nonlinear interaction between separated shear layer and acoustic forcing have been experimentally investigated. The researches demonstrate, in unexcited state, there exists the subharmonic phenomenon, which implies the evolution of separated shear layer is mainly through vortices merging process. From separation to reattachment, laminar separated shear layer will take 2 times vortices merging processes, and turbulence separated shear layer will experience 5 times vortices merging. From the point of view of nonlinear dynamical system, transition of separated shear layer from order to chaos is through Hopf bifurcation and periodical bifurcation. In addition, response of separated shear layer to acoustic forcing was discussed.

     

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  • 1. Ota T, Itasaka M. Separated and reattached flow on a blunt flat plate. ASME J Fluids Engng, 1976, 98:79~86 2. Kiya M, Sasaki K. Structure of a turbulent separation bubble. J Fluid Mech, 1983,137:83~113 3. Cherry N J, Hillier R, Latour M E M P. Unsteady measurements in a separated and reattaching flow. J Fluid Mech, 1984, 144:13~46 4. Sasaki K, Kiya M. Three-dimensional vortex structure in a leading-edge separation bubble at moderate Reynolds number. J Fluids Engng, 1991, 113:405~410 5. Bradshaw P, Wong F Y F. The reattachment and relaxation of a turbulent shear layer. J Fluid Mech, 1972, 52:113~135 6. Eaton J K, Johnston J P. Research on subsonic turbulent flow reattachment. AIAA J, 1981, 19(9):1093~1100 7. Ruderich R,Fernholz H H. An experimental investigation of a turbulent shear flow with separation, reverse flow, and reattachment. J Fluid Mech, 1986, 163:283~322 8. Gad-el-hak M, Blackwelder R F. On the discrete vortices from a delta wing.AIAA J, 1985, 23:961~962 9. Gad-el-hak M, Ho C M. Unsteady vortical flow around three dimensional lifting surfaces. AIAA J, 1986, 24(5):713~721[ZK)] 10. [ZK(#]Ota T. An axisymmetric separated and reattached flow on a longitudinal blunt circular cylinder. ASME J Appl Mech, 1975, 42:311~315 11. Ota T, Motegl H. Turbulence measurements in an axisymmetric separated and reattached flow over a longitudinal blunt circular cylinder. ASME J Appl Mech, 1980, 47:1~6 12. Kiya M, Mochizuki O, Tamura H, et al. Turbulence properties of an axisymmetric separation-and-reattaching flow. AIAA J, 1991, 29:936~941 13. 董宇飞.轴对称钝体分离流动及其控制:[学位论文].北京:北京大学力学系,1996
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