Drag Characteristics of Extra-Thin-Fin-Riblets in an Air Flow Conduit

[+] Author and Article Information
Z. Y. Wang

Department of Power Machinery Engineering, Xi’an Jiaotong University, Xi’an Shaanxi, P. R. China

J. Jovanovic

Lehrstuhl fur Stromungsmechanik, Universitat Erlangen—Nurnberg, D-8500 Erlangen, Germany

J. Fluids Eng 115(2), 222-226 (Jun 01, 1993) (5 pages) doi:10.1115/1.2910127 History: Received January 03, 1992; Revised July 16, 1992; Online May 23, 2008


An experimental study of riblets with extra thin fins (5 μm thick) is presented. A drag reduction of 2–3 percent per quarter conduit wall is indicated when h+ is around 3–15 in a square section of air flow conduit lined with the extra-thin-fin-riblets (ETFR) on one side wall. The pressure distributions along the conduit indicate the influence of the riblet front step on the drag reduction performance in the conduit flow. The measurement methods and the detailed structure of the ETFR are also discussed.

Copyright © 1993 by The American Society of Mechanical Engineers
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