Spatial hot-wire visualization of the Lambda-structure transformation into the turbulent spot on the smooth flat plate surface and riblet effect on this process
Artikel i vetenskaplig tidskrift, 2010

Evolution of the Lambda-vortex and its transformation into the turbulent spot in a flat plate boundary layer are investigated experimentally. Extensive measurements visualizing the Lambda-structure transformation into the turbulent spot on the smooth and ribbed surfaces of the flat plate are presented. The flow behavior in the course of spatial evolution of the Lambda-structure and turbulent spot is discussed. Specific features of the downstream evolution of Lambda-structure and turbulent spot on the smooth and ribbed surfaces are demonstrated, such as suppression by riblets of the Lambda-vortex transformation into the turbulent spot, appearance of the coherent structures of Lambda-vortex within ensemble-averaged turbulent spot, and oblique waves generation both by the Lambda-vortex and turbulent spot.

Riblets

Turbulent spot

Hot-wire anemometry

Lambda-structure

Visualization

Författare

Valery Chernoray

Chalmers, Tillämpad mekanik, Strömningslära

G. R. Grek

Khristianovich Institute of Theoretical and Applied Mechanics of the Siberian Branch of the RAS

V. V. Kozlov

Khristianovich Institute of Theoretical and Applied Mechanics of the Siberian Branch of the RAS

Y. A. Litvinenko

Khristianovich Institute of Theoretical and Applied Mechanics of the Siberian Branch of the RAS

Journal of Visualization

1343-8875 (ISSN) 1386-6478 (eISSN)

Vol. 13 2 151-158

Ämneskategorier

Fysik

Strömningsmekanik och akustik

DOI

10.1007/s12650-009-0004-7