Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781724666147
Total Pages : 268 pages
Book Rating : 4.6/5 (661 download)
Book Synopsis Surface-Pressure and Flow-Visualization Data at Mach Number of 1. 60 for Three 65 Deg Delta Wings Varying in Leading-Edge Radius and Camber by : National Aeronautics and Space Administration (NASA)
Download or read book Surface-Pressure and Flow-Visualization Data at Mach Number of 1. 60 for Three 65 Deg Delta Wings Varying in Leading-Edge Radius and Camber written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-08-04 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental investigation of the effect of leading-edge radius, camber, Reynolds number, and boundary-layer state on the incipient separation of a delta wing at supersonic speeds was conducted at the Langley Unitary Plan Wind Tunnel at Mach number of 1.60 over a free-stream Reynolds number range of 1 x 106 to 5 x 106 ft-1. The three delta wing models examined had a 65 deg swept leading edge and varied in cross-sectional shape: a sharp wedge, a 20:1 ellipse, and a 20:1 ellipse with a -9.750 circular camber imposed across the span. The wings were tested with and without transition grit applied. Surface-pressure coefficient data and flow-visualization data indicated that by rounding the wing leading edge or cambering the wing in the spanwise direction, the onset of leading-edge separation on a delta wing can be raised to a higher angle of attack than that observed on a sharp-edged delta wing. The data also showed that the onset of leading-edge separation can be raised to a higher angle of attack by forcing boundary-layer transition to occur closer to the wing leading edge by the application of grit or the increase in free-stream Reynolds number. McMillin, S. Naomi and Bryd, James E. and Parmar, Devendra S. and Bezos-OConnor, Gaudy M. and Forrest, Dana K. and Bowen, Susan Langley Research Center NASA-TM-4673, NAS 1.15:4673, L-17443 RTOP 505-59-53-05...