Turbulent wake behind a T-shaped plate: Comparison with a cross-shaped plate |
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| Institution: | 1. Department of Marine Technology, Norwegian University of Science and Technology, Trondheim, NO-7491, Norway;2. Department of Energy and Process Engineering, Norwegian University of Science and Technology, Trondheim, NO-7491, Norway;3. Department of Applied Mechanics, Indian Institute of Technology Madras, Chennai 600036, India;1. Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, East China University of Science and Technology, P.O. Box 272, Shanghai 200237, PR China;2. Shanghai Engineering Research Center of Coal Gasification, East China University of Science and Technology, P.O. Box 272, Shanghai 200237, PR China;1. Department of Mechanical and Manufacturing Engineering, University of Calgary, 2500 University Dr. NW, Calgary, Alberta, Canada;2. Department of Aerospace Engineering, Amirkabir University of Technology, Tehran, Iran |
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| Abstract: | The wake behind T-shaped intersecting flat plates has been studied by direct numerical simulations and compared with the wake behind intersecting plates forming a cross. The Reynolds number based on the uniform inflow velocity and the plate width d was 1000. Similar to the cross-plate the vortex shedding was suppressed in a 4d wide intersection region with a substantial base suction pressure reduction. Shear-layer (K-H) instabilities have been observed and its characteristic frequency obtained. In contrast to the cross-plate, a main feature of the mean wake structure behind the T-plate is the formation of two symmetrically positioned swirling vortices close to the internal corners of the T. This was examined by considering pressure contours and the turbulent production terms of mean streamwise vorticity. In spite of some similarities, major features of the wake behind the T-plate turned out to be distinctly different from the wake behind a cross-plate configuration. |
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