A Tabulation of Wind-tunnel Pressure Data and Section Aerodynamic Characteristics at Mach Numbers of 1.61 and 2.01 for Two Trapezoidal and Three Delta Wings Having Different Surface Shapes

A Tabulation of Wind-tunnel Pressure Data and Section Aerodynamic Characteristics at Mach Numbers of 1.61 and 2.01 for Two Trapezoidal and Three Delta Wings Having Different Surface Shapes
Author: Emma Jean Landrum
Publisher:
Total Pages: 76
Release: 1962
Genre: Aerodynamics
ISBN:

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The Delta Monster: An Rpv Designed to Investigate the Aerodynamics of a Delta Wing Platform

The Delta Monster: An Rpv Designed to Investigate the Aerodynamics of a Delta Wing Platform
Author: National Aeronautics and Space Adm Nasa
Publisher: Independently Published
Total Pages: 174
Release: 2018-11-23
Genre: Science
ISBN: 9781790126293

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The mission requirements for the performance of aerodynamic tests on a delta wind planform posed some problems, these include aerodynamic interference; structural support; data acquisition and transmission instrumentation; aircraft stability and control; and propulsion implementation. To eliminate the problems of wall interference, free stream turbulence, and the difficulty of achieving dynamic similarity between the test and actual flight aircraft that are associated with aerodynamic testing in wind tunnels, the concept of the remotely piloted vehicle which can perform a basic aerodynamic study on a delta wing was the main objective for the Green Mission - the Delta Monster. The basic aerodynamic studies were performed on a delta wing with a sweep angle greater than 45 degrees. These tests were performed at various angles of attack and Reynolds numbers. The delta wing was instrumented to determine the primary leading edge vortex formation and location, using pressure measurements and/or flow visualization. A data acquisition system was provided to collect all necessary data. Connolly, Kristen and Flynn, Mike and Gallagher, Randy and Greek, Chris and Kozlowski, Marc and Mcdonald, Brian and Mckenna, Matt and Sellar, Rich and Shearon, Andy AERODYNAMIC CHARACTERISTICS; AERODYNAMICS; AIRCRAFT STABILITY; DATA ACQUISITION; DELTA WINGS; MISSION PLANNING; REMOTELY PILOTED VEHICLES; AERODYNAMIC INTERFERENCE; ANGLE OF ATTACK; DYNAMIC TESTS; FLOW VISUALIZATION; LEADING EDGES; PRESSURE MEASUREMENT; REYNOLDS NUMBER; TURBULENCE; VORTICES; WIND TUNNEL TESTS...

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

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
Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
Total Pages: 268
Release: 2018-08-04
Genre:
ISBN: 9781724666147

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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...