Effect of riblets on the drag of a body of revolution with trailing-edge flow separation

Autor: S. F. Konovalov, V. V. Mikhailov, Yu. A. Lashkov
Rok vydání: 1998
Předmět:
Zdroj: Fluid Dynamics. 33:135-139
ISSN: 1573-8507
0015-4628
DOI: 10.1007/bf02698171
Popis: The results of measurements of the drag of axisymmetric bodies with smooth and ribbed central cylindrical sections and affinely similar trailing edges of various lengths are given. The experimental data were obtained for zero angle of attack and the numbers M=0.25–0.85 and Re=107–2.4·107 (calculated on the basis of the length of the body without the trailing section). The trailing-edge flow separation was visualized by the oil film method. It is shown that ribbing can lead to a decrease in drag due not only to a reduction in turbulent friction but also to reduction of the separation zone on the smooth trailing section of the body.
Databáze: OpenAIRE