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Theoretical Numerical Study Of Feasibility Of Use Of Winglets On Low Aspect Ratio Wings At Subsonic And Transonic Mach Numbers To Reduce Drag
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Book Synopsis Theoretical/numerical Study of Feasibility of Use of Winglets on Low Aspect Ratio Wings at Subsonic and Transonic Mach Numbers to Reduce Drag by : John M. Kuhlman
Download or read book Theoretical/numerical Study of Feasibility of Use of Winglets on Low Aspect Ratio Wings at Subsonic and Transonic Mach Numbers to Reduce Drag written by John M. Kuhlman and published by . This book was released on 1988 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: A numerical design study was conducted to assess the drag reduction potential of winglets installed on a series of low aspect ratio wings at a design point of M=0.8, C sub L=0.3. Wing-winglet and wing-alone design geometries were obtained for wings of aspect ratios between 1.75 and 2.67, having leading edge sweep angles between 45 and 60 deg. Winglet length was fixed at 15% of wing semispan. To assess the relative performance between wing-winglet and wing-alone configurations, the PPW nonlinear extended small disturbance potential flow code was utilized. This model has proven to yield plausible transonic flow field simulations for the series of low aspect ratio configurations selected. Predicted decreases in pressure drag coefficient for the wing-winglet configurations relative to the corresponding wing-alone planform are about 15% at the design point. Predicted decreases in wing-winglet total drag coefficient are about 12%, relative to the corresponding wing-alone design. Longer winglets (25% of the wing semispan) yielded decreases in the pressure drag of up to 22% and total drag of up to 16.4%. These predicted drag coefficient reductions are comparable to reductions already demonstrated by actual winglet designs installed on higher aspect ratio transport type aircraft.
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781722836740 Total Pages :88 pages Book Rating :4.8/5 (367 download)
Book Synopsis Theoretical-Numerical Study of Feasibility of Use of Winglets on Low Aspect Ration Wings at Subsonic and Transonic Mach Numbers to Reduce Drag by : National Aeronautics and Space Administration (NASA)
Download or read book Theoretical-Numerical Study of Feasibility of Use of Winglets on Low Aspect Ration Wings at Subsonic and Transonic Mach Numbers to Reduce Drag written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-17 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: A numerical design study was conducted to assess the drag reduction potential of winglets installed on a series of low aspect ratio wings at a design point of M=0.8, C sub L=0.3. Wing-winglet and wing-alone design geometries were obtained for wings of aspect ratios between 1.75 and 2.67, having leading edge sweep angles between 45 and 60 deg. Winglet length was fixed at 15% of wing semispan. To assess the relative performance between wing-winglet and wing-alone configurations, the PPW nonlinear extended small disturbance potential flow code was utilized. This model has proven to yield plausible transonic flow field simulations for the series of low aspect ratio configurations selected. Predicted decreases in pressure drag coefficient for the wing-winglet configurations relative to the corresponding wing-alone planform are about 15% at the design point. Predicted decreases in wing-winglet total drag coefficient are about 12%, relative to the corresponding wing-alone design. Longer winglets (25% of the wing semispan) yielded decreases in the pressure drag of up to 22% and total drag of up to 16.4%. These predicted drag coefficient reductions are comparable to reductions already demonstrated by actual winglet designs installed on higher aspect ratio transport type aircraft. Kuhlman, John M. and Liaw, Paul and Cerney, Michael J. Unspecified Center...
Book Synopsis Effects of Winglets on the Drag of a Low-Aspect-Ratio Configuration by : Leigh Ann Smith
Download or read book Effects of Winglets on the Drag of a Low-Aspect-Ratio Configuration written by Leigh Ann Smith and published by . This book was released on 1996 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Book Synopsis Scientific and Technical Aerospace Reports by :
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Book Synopsis The Effects of Winglets on Low Aspect Ratio Wings at Supersonic Mach Numbers by : James Anthony Keenan
Download or read book The Effects of Winglets on Low Aspect Ratio Wings at Supersonic Mach Numbers written by James Anthony Keenan and published by . This book was released on 1991 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Effects of Winglets on Low Aspect Ratio Wings at Supersonic Mach Numbers by : James A. Keenan
Download or read book The Effects of Winglets on Low Aspect Ratio Wings at Supersonic Mach Numbers written by James A. Keenan and published by . This book was released on 1991 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Computational Design of Low Aspect Ratio Wing-winglet Configurations for Transonic Wind-tunnel Tests by :
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