A Feasibility Study To Control Airfoil Shape Using Thunder Nasa Tm 4767 Dec 16 1997
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A Feasibility Study To Control Airfoil Shape Using Thunder Nasa Tm 4767 Dec 16 1997
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Author : United States. National Aeronautics and Space Administration
language : en
Publisher:
Release Date : 1999*
A Feasibility Study To Control Airfoil Shape Using Thunder Nasa Tm 4767 Dec 16 1997 written by United States. National Aeronautics and Space Administration and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999* with categories.
A Feasibility Study To Control Airfoil Shape Using Thunder
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Author : Jennifer L. Pinkerton
language : en
Publisher:
Release Date : 1997
A Feasibility Study To Control Airfoil Shape Using Thunder written by Jennifer L. Pinkerton and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with Aerodynamic load categories.
A Feasibility Study To Control Airfoil Shape Using Thunder
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Author : National Aeronautics and Space Administration (NASA)
language : en
Publisher: Createspace Independent Publishing Platform
Release Date : 2018-06-28
A Feasibility Study To Control Airfoil Shape Using Thunder written by National Aeronautics and Space Administration (NASA) and has been published by Createspace Independent Publishing Platform this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-06-28 with categories.
The objective of this study was to assess the capabilities of a new out-of-plane displacement piezoelectric actuator called thin-layer composite-unimorph ferroelectric driver and sensor (THUNDER) to alter the upper surface geometry of a subscale airfoil to enhance performance under aerodynamic loading. Sixty test conditions, consisting of combinations of five angles of attack, four dc applied voltages, and three tunnel velocities, were studied in a tabletop wind tunnel. Results indicated that larger magnitudes of applied voltage produced larger wafer displacements. Wind-off displacements were also consistently larger than wind-on. Higher velocities produced larger displacements than lower velocities because of increased upper surface suction. Increased suction also resulted in larger displacements at higher angles of attack. Creep and hysteresis of the wafer, which were identified at each test condition, contributed to larger negative displacements for all negative applied voltages and larger positive displacements for the smaller positive applied voltage (+102 V). An elastic membrane used to hold the wafer to the upper surface hindered displacements at the larger positive applied voltage (+170 V). Both creep and hysteresis appeared bounded based on the analysis of several displacement cycles. These results show that THUNDER can be used to alter the camber of a small airfoil under aerodynamic loads. Pinkerton, Jennifer L. and Moses, Robert W. Langley Research Center RTOP 505-63-50-13...
A Feasibility Study To Control Airfoil Shape Using Thunder
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Author : Jennifer L. Pinkerton
language : en
Publisher:
Release Date : 1997
A Feasibility Study To Control Airfoil Shape Using Thunder written by Jennifer L. Pinkerton and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with categories.