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Thursday, May 14, 2020 | History

2 edition of Natural laminar flow experiments on modern airplane surfaces found in the catalog.

Natural laminar flow experiments on modern airplane surfaces

Bruce J Holmes

Natural laminar flow experiments on modern airplane surfaces

by Bruce J Holmes

  • 251 Want to read
  • 1 Currently reading

Published by National Aeronautics and Space Administration, Scientific and Technical Information Branch, For sale by the National Technical Information Service] in Washington, D.C, [Springfield, Va .
Written in English

    Subjects:
  • Airplanes -- Materials,
  • Airplanes -- Wings,
  • Laminar flow,
  • Aerodynamics

  • Edition Notes

    StatementBruce J. Holmes, Clifford J. Obara, Long P. Yip
    SeriesNASA technical paper -- 2256
    ContributionsObara, Clifford J, Yip, Long P, United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch
    The Physical Object
    Paginationiv, 139 p. :
    Number of Pages139
    ID Numbers
    Open LibraryOL14933496M

    Abstract. Paper briefly summarizes the current status of linear stability theory as applied to laminar flow control for aerodynamics. Results indicate that the conventional “N factor” method of correlating stability theory and transition has a broad application range, including low- and high-speeds, two- and three- dimensional mean flow and TS, Gortler and crossflow disturbance innovationoptimiser.com by: Natural laminar flow flight experiments on a swept wing business jet: Boundary layer stability analyses (NASA contractor report) [R. A Rozendaal] on innovationoptimiser.com *FREE* shipping on qualifying innovationoptimiser.com: R. A Rozendaal.

    Analysis of Natural Laminar Flow Aircraft based on Airline Network Design and Fleet Assignment drag by increasing the regions with a laminar boundary layer e.g., on wing surfaces. Consequently, the aircraft paper is an operational analysis of the natural laminar ow (NLF) concept in terms of network bene ts. Cobra fighter airplane with an NACA airfoil demonstrated natural laminar flow to a maximum of 60% chord for Mach numbers as high as Wing glove flight tests on the F94 airplane demonstrated full chord laminar flow using boundary layer suction through slots at chord Reynolds numbers up to 37 x and Mach numbers up to

    that economic hurdle. Natural laminar flow (NLF) wing design technology is an important means to reduce the aerodynamic drag. The. Japan Aerospace Exploration Agency (JAXA) developed a scaled supersonic experimental airplane called -1 in National NEXST EXperimental Supersonic Transport (NEXST) project with the NLF wing design concept and. General NASA must continue to provide the necessary resources for aerodynamics research and validation, including resources focused on specific key technologies, resources to maintain and enhance ground and flight test facilities, and resources for enhanced analytical and design capabilities.. Specific. The following research topics should serve as the focus of NASA's research effort in.


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Natural laminar flow experiments on modern airplane surfaces by Bruce J Holmes Download PDF EPUB FB2

Flight and wind-tunnel natural laminar flow experiments have been conducted on various lifting and nonlifting surfaces of several airplanes at unit Reynolds numbers between x 10 to the 6th. Natural laminar flow experiments on modern airplane surfaces.

Washington, D.C.: National Aeronautics and Space Administration, Scientific and Technical Information Branch ; [Springfield, Va.: For sale by the National Technical Information Service], (OCoLC) Material Type: Government publication, National government publication.

Full text of "Natural laminar flow experiments on modern airplane surfaces" See other formats. Jul 12,  · Flight and wind-tunnel natural laminar flow experiments have been conducted on various lifting and nonlifting surfaces of several airplanes at unit Reynolds numbers between x 10 to the 6th power/ft and x 10 to the 6th power/ft, at Mach numbers from toand at lifting surface leading-edge sweep angles from 0 deg to 63 deg.

NASA's research in the s revealed the practicality and usefulness of laminar flow wing designs and opened the way for laminar flow applications on modern practical aircraft surfaces, from subsonic general aviation aircraft to transonic large transport aircraft, to supersonic designs.

Natural laminar flow experiments on modern airplane surfaces / Bruce J. Holmes, Clifford J. Obara, Long P. Yip. Holmes, Bruce J.; Obara, Clifford J.; and Yip, Long P.: Natural Laminar Flow Experiments on Modern Airplane Surfaces. NASA TP, A report on all aspects of the experiment.

Describes purpose, methods, and results. Includes photographs of sublimation results and. Natural laminar flow wing for supersonic conditions: Wind tunnel experiments, flight test and stability computations.

A CFD solver provides the flow around the whole airplane (wing, body, tail) and a geometry modification procedure is applied to the wing alone. An iterative process is performed to converge towards the target pressure Cited by: 6. Making a Smoother (and Speedier) Airplane “Natural Laminar Flow Experiments on Modern Aircraft Surfaces.” These experiments, conducted at the agency’s Langley Research Center in Virginia, used a novel technique to ascertain whether natural laminar flow was achieved.

The researchers sprayed a thin layer of a light-colored chemical in a. Flight Research on Natural Laminar Flow Applications. Authors; Authors and affiliations Clifford J.; and Yip, Long, P.: Natural Laminar Flow Flight Experiments on Modern Airplane Surfaces.

NASA TP, Obara C.J. () Flight Research on Natural Laminar Flow Applications. In: Barnwell R.W., Hussaini M.Y. (eds) Natural Laminar Cited by: 6. 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 s and rapidly became the foundation of much.

region of favorable pressure gradient on these smooth airplane surfaces and provide a significant reduction in profile drag (ref. As a result, a resurgence is occurring in developing new low-drag airfoils and wings designed to obtain significant amounts of natural laminar flow (NLF) (refs.

4, 5, and 6). The Bell P Kingcobra is an American fighter aircraft developed by Bell Aircraft during World War innovationoptimiser.com on the preceding Bell P Airacobra, the P's design incorporated suggestions from P pilots and was superior to its predecessor in virtually all innovationoptimiser.com P was not accepted for combat use by the United States Army Air Forces.

Manufacturer: Bell Aircraft. Abstract. On December 17,B. Melvill Jones presented the first Wright Brothers’ lecture at Columbia University in New York (Ref. His lecture, which was entitled “Flight Experiments on the Boundary Layer,” dealt specifically with the first British flight observations of transition of the boundary layer from laminar to turbulent innovationoptimiser.com by: 6.

Aircraft conceptual design with natural laminar flow. cruise drag of modern civil airplanes. A delaying laminar to turbulent boundary layer transition on aerodynamic surfaces is one of the. Preforming this Twist in Time- Laminar Flow activity is pretty cool, but it isn’t a science fair project, yet.

You can create a science fair project by identifying a variable, or something that changes, in this experiment. Let’s take a look at some of the variable options that might work. Mar 29,  · Criteria for allowable tolerances on low-sweep Natural Laminar Flow surfaces can now be established from the functional relations determined in this work.

Obara, C.J., Yip, L.P.: Natural laminar flow experiments on modern airplane surfaces. NASA TP Kühn W. () Effect of Forward-Facing Steps on Boundary Layer Transition at a Subsonic Cited by: 4.

Sep 25,  · A short history of airfoils. Thin surfaces restrained by a supporting structure naturally bellied out under air pressure, assuming what we now call a "cambered" -- that is, arched -- shape.

Natural Laminar Flow (NLF) on Swept Wings: F/TACT and F airplane surfaces. This important technique offers the potential for significant reduction in drag and, thereby, for large increases in range or reductions in fuel transition from laminar to turbulent flow and the complete mixing of the fluid elements in turbulent flow.

Reynolds. InEastman Jacobs at the NACA in Langley, designed and tested the first laminar flow airfoil sections. These shapes had extremely low drag and the section shown here achieved a lift to drag ratio of about A modern laminar flow section, used on sailplanes, illustrates that the concept is practical for some applications.

Natural-Laminar-Flow Airfoil for General-Aviation Applications used over the regions of the wings in which control surfaces are located, large control forces can exist and the control Many of the design requirements for a modern general­.Aerospace Science and Technology,n1, amic Design of a Natural Laminar Flow Nacelle and the Design Validation by Flight Testing H.

Riedel, K.-H. Horstmann, A. Ronzheimer, M. Sitzmann Institut fiir Entzourfsaerodynamik, Deutsches Forschungszentrum fiir Luft- and Raurnfahrt (DLR), halplatz 7, D Braunschweig; innovationoptimiser.com by: Buy Natural Laminar Flow and Laminar Flow Control (ICASE NASA LaRC Series) on innovationoptimiser.com FREE SHIPPING on qualified orders.