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An Approach To The Constrained Design Of Natural Laminar Flow Airfoils
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Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781722177904 Total Pages :78 pages Book Rating :4.1/5 (779 download)
Book Synopsis An Approach to the Constrained Design of Natural Laminar Flow Airfoils by : National Aeronautics and Space Administration (NASA)
Download or read book An Approach to the Constrained Design of Natural Laminar Flow Airfoils written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-06 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: A design method has been developed by which an airfoil with a substantial amount of natural laminar flow can be designed, while maintaining other aerodynamic and geometric constraints. After obtaining the initial airfoil's pressure distribution at the design lift coefficient using an Euler solver coupled with an integral turbulent boundary layer method, the calculations from a laminar boundary layer solver are used by a stability analysis code to obtain estimates of the transition location (using N-Factors) for the starting airfoil. A new design method then calculates a target pressure distribution that will increase the laminar flow toward the desired amount. An airfoil design method is then iteratively used to design an airfoil that possesses that target pressure distribution. The new airfoil's boundary layer stability characteristics are determined, and this iterative process continues until an airfoil is designed that meets the laminar flow requirement and as many of the other constraints as possible. Green, Bradford E. Langley Research Center...
Book Synopsis An Approach to Constrained Aerodynamic Design with Application to Airfoils by : Richard Lawson Campbell
Download or read book An Approach to Constrained Aerodynamic Design with Application to Airfoils written by Richard Lawson Campbell and published by . This book was released on 1992 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Approach to the Constrained Design of Natural Laminar Flow Airfoils by : Bradford E. Green
Download or read book An Approach to the Constrained Design of Natural Laminar Flow Airfoils written by Bradford E. Green and published by . This book was released on 1997 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Approach to Constrained Aerodynamic Design with Application to Airfoils by : National Aeronautics and Space Administration NASA
Download or read book An Approach to Constrained Aerodynamic Design with Application to Airfoils written by National Aeronautics and Space Administration NASA and published by . This book was released on 2018-10-23 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: An approach was developed for incorporating flow and geometric constraints into the Direct Iterative Surface Curvature (DISC) design method. In this approach, an initial target pressure distribution is developed using a set of control points. The chordwise locations and pressure levels of these points are initially estimated either from empirical relationships and observed characteristics of pressure distributions for a given class of airfoils or by fitting the points to an existing pressure distribution. These values are then automatically adjusted during the design process to satisfy the flow and geometric constraints. The flow constraints currently available are lift, wave drag, pitching moment, pressure gradient, and local pressure levels. The geometric constraint options include maximum thickness, local thickness, leading-edge radius, and a 'glove' constraint involving inner and outer bounding surfaces. This design method was also extended to include the successive constraint release (SCR) approach to constrained minimization. Campbell, Richard L. Langley Research Center RTOP 505-59-10-03...
Book Synopsis Monthly Catalog of United States Government Publications by :
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1993 with total page 1034 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Springer Science & Business Media. This book was released on 2012-12-06 with total page 415 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research on laminar flow and its transition to turbulent flow has been an important part of fluid dynamics research during the last sixty years. Since transition impacts, in some way, every aspect of aircraft performance, this emphasis is not only understandable but should continue well into the future. The delay of transition through the use of a favorable pressure gradient by proper body shaping (natural laminar flow) or the use of a small amount of suction (laminar flow control) was recognized even in the early 1930s and rapidly became the foundation of much of the laminar flow research in the U.S. and abroad. As one would expect, there have been many approaches, both theoretical and experimental, employed to achieve the substantial progress made to date. Boundary layer stability theories have been formu lated and calibrated by a good deal of wind tunnel and flight experiments. New laminar now airfoils and wings have been designed and many have been employed in aircraft designs. While the early research was, of necessity, concerned with the design of subsonic aircraft interest has steadily moved to higher speeds including those appropriate to planetary entry. Clearly, there have been substantial advances in our understanding of transition physics and in the development and application of transition prediction methodolo gies to the design of aircraft.
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 Instabilities of Flows and Transition to Turbulence by : Tapan K. Sengupta
Download or read book Instabilities of Flows and Transition to Turbulence written by Tapan K. Sengupta and published by CRC Press. This book was released on 2012-04-24 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt: Addressing classical material as well as new perspectives, Instabilities of Flows and Transition to Turbulence presents a concise, up-to-date treatment of theory and applications of viscous flow instability. It covers materials from classical instability to contemporary research areas including bluff body flow instability, mixed convection flows, a
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 NASA Langley Scientific and Technical Information Output: 1997 by :
Download or read book NASA Langley Scientific and Technical Information Output: 1997 written by and published by . This book was released on 1998 with total page 162 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 Design of a slotted, natural-laminar-flow airfoil for business-jet applications by : Dan M. Somers
Download or read book Design of a slotted, natural-laminar-flow airfoil for business-jet applications written by Dan M. Somers and published by . This book was released on 2012 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 The Proceedings of the 2021 Asia-Pacific International Symposium on Aerospace Technology (APISAT 2021), Volume 1 by : Sangchul Lee
Download or read book The Proceedings of the 2021 Asia-Pacific International Symposium on Aerospace Technology (APISAT 2021), Volume 1 written by Sangchul Lee and published by Springer Nature. This book was released on 2022-08-30 with total page 1027 pages. Available in PDF, EPUB and Kindle. Book excerpt: This proceeding comprises peer-reviewed papers of the 2021 Asia-Pacific International Symposium on Aerospace Technology (APISAT 2021), held from 15-17 November 2021 in Jeju, South Korea. This book deals with various themes on computational fluid dynamics, wind tunnel testing, flow visualization, UAV design, flight simulation, satellite attitude control, aeroelasticity and control, combustion analysis, fuel injection, cooling systems, spacecraft propulsion and so forth. So, this book can be very helpful not only for the researchers of universities and academic institutes, but also for the industry engineers who are interested in the current and future advanced topics in aerospace technology.
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 1994 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Design Optimization of Natural Laminar Flow Bodies in Compressible Flow by : Simha S. Dodbele
Download or read book Design Optimization of Natural Laminar Flow Bodies in Compressible Flow written by Simha S. Dodbele and published by . This book was released on 1992 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
