Abstract
A method is suggested of reducing the hydrodynamic resistance by replacing circular cylindrical tubes (CT) by socalled asymmetrical wavy tubes of varying cross section with long exist cone and short nozzle portions. Mathematical simulation of laminar motion of an incompressible fluid (the Navier-Stokes equations) has shown that a change in geometric parameters can change the resistance substantially, making it larger or smaller than the resistance of an ordinary cylindrical tube. The velocity and pressure fields, friction resistances, pressure profiles, and total resistances of such tubes are given. An experiment has been carried out. A numerical experiment provides a resistance reduced by up to 80%, while the physical experiment provides a reduction by 50%.
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Literature Cited
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Additional information
Donetsk State University. Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 62, No. 4, pp. 525–533, April, 1992.
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Povkh, I.L., Finoshin, N.V. Hydrodynamics of tubes of varying cross section. J Eng Phys Thermophys 62, 373–380 (1992). https://doi.org/10.1007/BF00854948
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DOI: https://doi.org/10.1007/BF00854948