Inviscid and Viscous Interactions in Subsonic Corner Flows. (27th June 2013)

• Record Type: Journal Article
• Authors: Chung, Kung-Ming; Chang, Po-Hsiung; Chang, Keh-Chin
• Other Names: Baoyin Hexi Academic Editor.; Prado Antonio F. Bertachini A. Academic Editor.; Zhang Chi Academic Editor.
• Is Part Of: TheScientificWorldjournal. Volume 2013(2013)
• Publication Date: 2013-06-27
• Subjects: Science -- Periodicals; Technology -- Periodicals; Medicine -- Periodicals; 505
• DOI: 10.1155/2013/940862
• Languages: English
• ISSNs: 2356-6140

Abstract

Abstract : A flap can be used as a high-lift device, in which a downward deflection results in a gain in lift at a given geometric angle of attack. To characterize the aerodynamic performance of a deflected surface in compressible flows, the present study examines a naturally developed turbulent boundary layer past the convex and concave corners. This investigation involves the analysis of mean and fluctuating pressure distributions. The results obtained indicate strong inviscid-viscous interactions. There are upstream expansion and downstream compression for the convex-corner flows, while the opposite trend is observed for the concave-corner flows. A combined flow similarity parameter, based on the small perturbation theory, is proposed to scale the flow characteristics in both subsonic convex- and concave-corner flows.