Effect of Surface Roughness on Unseparated Shock-Wave/Turbulent Boundary-Layer Interactions

Autor:	Holger Babinsky, George R. Inger
Rok vydání:	2002
Předmět:	Shock wave Materials science business.industry Turbulence Aerospace Engineering Surface finish Mechanics Boundary layer Optics Parasitic drag Surface roughness Oblique shock business Displacement (fluid)
Zdroj:	AIAA Journal. 40:1567-1573
ISSN:	1533-385X 0001-1452
DOI:	10.2514/2.1825
Popis:	The effect of surface roughness and step changes of surface roughness on an unseparated incipient shockwave/turbulent boundary-layer interaction has been studied using complementary experimental and theoretical investigations. Step changes in surface roughness lead to nonequilibrium boundary layers displaying different characteristics in the near-wall and far-wall regions. Both theory and experiment confirmed that the dominant effect of roughness, even in configurations featuring step changes of surface properties, is a change of boundary-layer displacement thickness and that the upstream influence of the interaction scales very well with the roughness modified incoming displacement thickness in all cases. The theory also identified small additional roughness effects, particularly for configurations featuring a smooth/rough wall transition ahead of the interaction
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e8c07620ffb4b3ef7724e1002cf1c1f6 https://doi.org/10.2514/2.1825 Zobrazit plný text záznamu