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Turbulent pipe flow manipulation: some experimental and computational results for single manipulator rings |
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| Authors: | A Pollard A M Savill and H Thomann |
| Institution: | (1) Department of Mechanical Engineering, Queen's University at Kingston, K7L-3N6, Ontario, Canada;(2) Engineering Department, University of Cambridge, Trumpington Street, CB2 1PZ Cambridge, U.K.;(3) Eidgenössiche Technische Hochschule, Sonnegstrasse 3, CH-8092 Zurich, Switzerland |
| Abstract: | The effect on developing turbulent pipe flow of blade manipulator devices has been investigated both experimentally and computationally with a view towards reducing pipeline transmission losses. Wall pressure and mean axial velocity profiles have been obtained for nine manipulator configurations. Numerical calculations have been performed for two of these manipulator configurations using a finite volume method that incorporates a low Reynolds number model of turbulence. The results suggest that nett drag reduction may be possible in this flow although at present this seems unlikely. It remains to be answered whether any benefit can be achieved in fully developed flow for which both experimental and computational studies are now underway. |
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