Evolution of the vortex structures and turbulent spots at the late-stage of transitional boundary layers |
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| Authors: | CHEN Lin TANG DengBin LU Ping & LIU ChaoQun |
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| Affiliation: | CHEN Lin1,TANG DengBin1*,LU Ping2 & LIU ChaoQun2 1 Department of Aerodynamics,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China,2 Department of Mathematics,University of Texas at Arlington,Arlington,Texas 76010,USA |
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| Abstract: | The nonlinear evolution process of new vortex structures at the late-stage of the transition, including the 3-D spatial structure of barrel-shaped vortex and dark spots structure observed by experiment research, has been confirmed by our computational results. The formation mechanisms of these structures have been explored. It is revealed that the new vortex structures, the ring-like vortex chain and induced disturbance velocities play a dominant role in the generation of turbulent spots. |
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| Keywords: | boundary layers transition barrel-shaped vortex turbulent spots direct numerical simulation |
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