Turbulent Boundary Layer and Flow Resistance on Plates Roughened by Wires

[+] Author and Article Information
Y. Furuya, M. Miyata

Department of Mechanical Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Japan

H. Fujita

Department of Mechanical Engineering, Mie University, Kamihama, Tsu, Mie Prefecture

J. Fluids Eng 98(4), 635-643 (Dec 01, 1976) (9 pages) doi:10.1115/1.3448434 History: Received January 05, 1976; Online October 12, 2010


The flow resistance in a plate roughened by equally spaced wires at right angles to the flow direction was investigated experimentally by measuring the turbulent boundary layer developing along it. Measurements of pressure distribution around a roughness element revealed that the pressure drag accounts for a large portion of the surface resistance and remaining skin frictional part is almost equal to that of a smooth plate. Measurements were also made for plates having three-dimensional roughness. These plates were roughened by short wires in a staggered manner. In this case, the boundary layer was found to have a three-dimensional structure due to accompanying secondary currents.

Copyright © 1976 by ASME
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