An Experimental Investigation of the Confluent Boundary Layer on a High-Lift System by F. O. Thomas and R. C. Nelson Prepared for NASA Ames Research Center under Grant NAG2-905 FINAL PROJECT REPORT
An Experimental Investigation of the Confluent Boundary Layer on a High-Lift System by F. O. Thomas and R. C. Nelson Prepared for NASA Ames Research Center under Grant NAG2-905 FINAL PROJECT REPORT
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This paper describesa fundamentalexperimentalinvestigation of the confluent boundary layer generated by the interaction of a leading-edge slat wake with the boundary layer on the main element of a multi-element airfoil model. The slat and airfoil model geometry are both fully two-dimensional. The research reported in this paper is performed in an attempt to investigate the flow physics of confluent boundary layers and to build an archival data base on the interaction of the slat wake and the main element wall layer. In addition, an attempt is made to clearly identify the role that slat wake / airfoil boundary layer confluence has on lift production and how this occurs. Although complete LDV flow surveys were performed for a variety of slat gap and overhang settings, in this report the focus is on two cases representing both strong and weak wake boundary layer confluence.
