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Natural Laminar Flow Airfoil Design Considerations For Winglets On Low Speed Airplanes
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Book Synopsis Natural Laminar Flow Airfoil Design Considerations for Winglets on Low-speed Airplanes by : Cornelis P. Van Dam
Download or read book Natural Laminar Flow Airfoil Design Considerations for Winglets on Low-speed Airplanes written by Cornelis P. Van Dam and published by . This book was released on 1984 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Natural Laminar Flow Airfoil Design Considerations for Winglets on Low-speed Airplanes by : C. P. Vandam
Download or read book Natural Laminar Flow Airfoil Design Considerations for Winglets on Low-speed Airplanes written by C. P. Vandam and published by . This book was released on 1984 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Winglet airfoil section characteristics which significantly influence cruise performance and handling qualities of an airplane are discussed. A good winglet design requires an airfoil section with a low cruise drag coefficient, a high maximum lift coefficient, and a gradual and steady movement of the boundary layer transition location with angle of attack. The first design requirement provides a low crossover lift coefficient of airplane drag polars with winglets off and on. The other requirements prevent nonlinear changes in airplane lateral/directional stability and control characteristics. These requirements are considered in the design of a natural laminar flow airfoil section for winglet applications and chord Reynolds number of 1 to 4 million.
Book Synopsis Natural Laminar Flow Airfoil Design Considerations for Winglets on Low-speed Airplanes by : Cornelis P. Van Dam
Download or read book Natural Laminar Flow Airfoil Design Considerations for Winglets on Low-speed Airplanes written by Cornelis P. Van Dam and published by . This book was released on 1984 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Enhancements to the Inverse Design of Low-Speed Natural-Laminar-Flow Airfoils by :
Download or read book Enhancements to the Inverse Design of Low-Speed Natural-Laminar-Flow Airfoils written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of inverse airfoil design has traditionally been the determination of the airfoil shape that results in desired aerodynamic characteristics. Under this general classification, inverse methods have progressed a great deal over the past few decades. With modern inverse methods, it is possible to prescribe velocity and/or boundary-layer characteristics along with desired geometric constraints in the design of airfoils. In spite of these advances, inverse airfoil design still involves a certain amount of trial and error when a designer attempts to fine tune the drag polar of the airfoil or when attempting to tailor the airfoil for a particular application. The research presented in this thesis makes two specific advances to the state of the art in inverse design. The first part of the research describes the development of an approach by which a desired boundary-layer transition curve can be specified as an input to inverse design. The second part presents an approach for incorporating aircraft performance considerations in the inverse design process. The two advances can help reduce the design cycle time for airfoil and aircraft design by reducing the amount of trial and error in the design process. The motivation factor for the first part of the research (inverse design via specification of the boundary-layer transition curve) was the strong connection between the transition curve and the airfoil drag polar. In the approach developed, a multidimensional Newton iteration is used to adjust the velocity distribution until the transition lift coefficient at several locations on the airfoil are within a given tolerance of the specifications. It is shown that the shape of the drag bucket as well as the camber and extents of laminar flow on the airfoil can be controlled through the specification of the transition-curve. This method represents an enhancement over previous inverse airfoil design methods since it allows for a single specification that spans multipl.
Book Synopsis Design and Experimental Results for a Natural-Laminar-Flow Airfoil for General Aviation Application by : Dan M. Somers
Download or read book Design and Experimental Results for a Natural-Laminar-Flow Airfoil for General Aviation Application written by Dan M. Somers and published by . This book was released on 1981 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: A natural-laminar-flow airfoil for general aviation applications, the NLF(1)-0416, was designed and analyzed theoretically and verified experimentally in the Langley Low-Turbulence Pressure Tunnel. The basic objective of combining the high maximum lift of the NASA low-speed airfoils with the low cruise drag of the NACA 6-series airfoils was achieved. The safety requirement that the maximum lift coefficient not be significantly affected with transition fixed near the leading edge was also met. Comparisons of the theoretical and experimental results show excellent agreement. Comparisons with other airfoils, both laminar flow and turbulent flow, confirm the achievement of the basic objective.
Book Synopsis Laminar Flow Aircraft Certification by :
Download or read book Laminar Flow Aircraft Certification written by and published by . This book was released on 1986 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Design and Experimental Results for a Flapped Natural-laminar-flow Airfoil for General Aviation Applications by : Dan M. Somers
Download or read book Design and Experimental Results for a Flapped Natural-laminar-flow Airfoil for General Aviation Applications written by Dan M. Somers and published by . This book was released on 1981 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: A flapped natural laminar flow airfoil for general aviation applications, the NLF(1)-0215F, has been designed and analyzed theoretically and verified experimentally in the Langley Low Turbulence Pressure Tunnel. The basic objective of combining the high maximum lift of the NASA low speed airfoils with the low cruise drag of the NACA 6 series airfoils has been achieved. The safety requirement that the maximum lift coefficient not be significantly affected with transition fixed near the leading edge has also been met. Comparisons of the theoretical and experimental results show generally good agreement.
Book Synopsis Design and Experimental Results for a Natural-laminar-flow Airfoil for General Aviation Applications by : Dan M. Somers
Download or read book Design and Experimental Results for a Natural-laminar-flow Airfoil for General Aviation Applications written by Dan M. Somers and published by . This book was released on 1981 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Natural Laminar Flow Airfoil Analysis and Trade Studies by :
Download or read book Natural Laminar Flow Airfoil Analysis and Trade Studies written by and published by . This book was released on 1979 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Design Studies of Thick Laminar-Flow Airfoils for Low Speed Flight Employing Turbulent Boundary Layer Suction Over the Rear Part by : J. L. van Ingen
Download or read book Design Studies of Thick Laminar-Flow Airfoils for Low Speed Flight Employing Turbulent Boundary Layer Suction Over the Rear Part written by J. L. van Ingen and published by . This book was released on 1984 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: First the paper briefly reviews some computational tools, used at the author's institute, to analyse and design airfoils for low speed flight (prediction of potential flow pressure distributions, laminar boundary layer flows, transition prediction using the e(superscript n)- method and Head's entrainment method for the calculation of turbulent boundary layers). These tools are used in this paper to design pressure distributions and corresponding airfoil shapes producing long runs of natural laminar flow. Inevitably this results in airfoils with the maximum thickness far backwards, eventually leading to separation of the turbulent boundary layer over the rear part of the airfoil. This turbulent boundary layer separation is prevented by selecting a proper pressure distribution over the rear part and/or suction of the turbulent boundary layer through slots or distributed perforations. Design charts are presented which help to select the required pressure distributions for laminar and turbulent flow. (Author).
Book Synopsis Natural Laminar Flow and Laminar Flow Control by : R. W. Barnwell
Download or read book Natural Laminar Flow and Laminar Flow Control written by R. W. Barnwell and published by . This book was released on 1992 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 994 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Approach to the Constrained Design of Natural Laminar Flow Airfoils by :
Download or read book An Approach to the Constrained Design of Natural Laminar Flow Airfoils written by and published by . This book was released on 1997 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Design and Testing of a Winglet Airfoil for Low-speed Aircraft by : Mark D. Maughmer
Download or read book Design and Testing of a Winglet Airfoil for Low-speed Aircraft written by Mark D. Maughmer and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Information Output of the Langley Research Center for Calendar Year 1984 by :
Download or read book Scientific and Technical Information Output of the Langley Research Center for Calendar Year 1984 written by and published by . This book was released on 1985 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Enhancements to the Inverse Design of Low-speed Natural-laminar-flow Airfoils by : Jeffrey Keith Jepson
Download or read book Enhancements to the Inverse Design of Low-speed Natural-laminar-flow Airfoils written by Jeffrey Keith Jepson and published by . This book was released on 2003 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: Keywords: inverse airfoil design, natural laminar flow airfoils.
Book Synopsis Analysis of Nonplanar Wing-tip-mounted Lifting Surfaces on Low-speed Airplanes by : Cornelis P. Van Dam
Download or read book Analysis of Nonplanar Wing-tip-mounted Lifting Surfaces on Low-speed Airplanes written by Cornelis P. Van Dam and published by . This book was released on 1983 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
