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Flow Environment Study Near The Empennage Of A 15 Percent Scale Helicopter Model
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Book Synopsis Flow Environment Study Near the Empennage of a 15-Percent Scale Helicopter Model by : Susan Althoff Gorton
Download or read book Flow Environment Study Near the Empennage of a 15-Percent Scale Helicopter Model written by Susan Althoff Gorton and published by . This book was released on 2000 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Development of advanced rotorcraft configurations has highlighted a need for high-quality experimental data to support the development of flexible and accurate analytical design tools. To provide this type of data, a test program was conducted in the Langley 14- by 22-Foot Subsonic Tunnel to measure the flow near the empennage of a 15-percent scale powered helicopter model with an operating tail fan. Three-component velocity profiles were measured with laser velocimetry (LV) one chord forward of the horizontal tail for four advance ratios to evaluate the effect of the rotor wake impingement on the horizontal tail angle of attack. These velocity data indicate the horizontal tail can experience unsteady angle of attack variations of over 30 degress due to the rotor wake influence. The horizontal tail is most affected by the rotor wake above advance ratios of 0.10. Velocity measurements of the flow on the inlet side of the tail fan were made for a low-speed flight condition using conventional LV techniques. The velocity data show an accelerated flow near the tail fan duct, and vorticity calculations track the passage of main rotor wake vortices through the measurement plane.
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781720526216 Total Pages :30 pages Book Rating :4.5/5 (262 download)
Book Synopsis Flow Environment Study Near the Empennage of a 15-Percent Scale Helicopter Model by : National Aeronautics and Space Administration (NASA)
Download or read book Flow Environment Study Near the Empennage of a 15-Percent Scale Helicopter Model written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-05-31 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: Development of advanced rotorcraft configurations has highlighted a need for high-quality experimental data to support the development of flexible and accurate analytical design tools. To provide this type of data, a test program was conducted in the Langley 14- by 22-Foot Subsonic Tunnel to measure the flow near the empennage of a 15-percent scale powered helicopter model with an operating tail fan. Three-component velocity profiles were measured with laser velocimetry (LV) one chord forward of the horizontal tail for four advance ratios to evaluate the effect of the rotor wake impingement on the horizontal tail angle of attack. These velocity data indicate the horizontal tail can experience unsteady angle of attack variations of over 30 degrees due to the rotor wake influence. The horizontal tail is most affected by the rotor wake above advance ratios of 0.10. Velocity measurements of the flow on the inlet side of the tail fan were made for a low-speed flight condition using conventional LV techniques. The velocity data show an accelerated flow near the tail fan duct, and vorticity calculations track the passage of main rotor wake vortices through the measurement plane.Gorton, Susan Althoff and Berry, John D. and Hodges, W. Todd and Reis, Deane G.Langley Research CenterHELICOPTERS; DESIGN ANALYSIS; HORIZONTAL TAIL SURFACES; ROTARY WING AIRCRAFT; SCALE MODELS; ANGLE OF ATTACK; VORTICITY; WAKES; VELOCITY MEASUREMENT; VELOCITY DISTRIBUTION
Book Synopsis Flow Environmental Study Near the Empennage of a 15-percent Scale Helicopter Model by :
Download or read book Flow Environmental Study Near the Empennage of a 15-percent Scale Helicopter Model written by and published by . This book was released on 2000 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Flow Environment Study Near the Empennage of a 15% Scale Helicopter Model by : Susan A. Gorton
Download or read book Flow Environment Study Near the Empennage of a 15% Scale Helicopter Model written by Susan A. Gorton and published by . This book was released on 2000 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Flow Environment Study Near the Empennage of a 15-percent Scale Helicopter by : Susan Althoff Gorton
Download or read book Flow Environment Study Near the Empennage of a 15-percent Scale Helicopter written by Susan Althoff Gorton and published by . This book was released on 2000 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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