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Monday, April 20, 2020 | History

3 edition of Full-scale semispan tests of a business-jet wing with a natural laminar flow airfoil found in the catalog.

Full-scale semispan tests of a business-jet wing with a natural laminar flow airfoil

Full-scale semispan tests of a business-jet wing with a natural laminar flow airfoil

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

    Subjects:
  • Aerofoils -- Testing.,
  • Airplanes -- Wings -- Testing.,
  • Laminar flow.,
  • Airfoil profiles.,
  • Flapping.,
  • Full scale tests.,
  • Jet aircraft.,
  • Laminar flow airfoils.,
  • Low speed.,
  • Semispan models.,
  • Wind tunnel tests.

  • Edition Notes

    StatementDavid E. Hahne and Frank L. Jordan, Jr.
    SeriesNASA technical paper -- 3133.
    ContributionsJordan, Frank L., United States. National Aeronautics and Space Administration. Scientific and Technical Information Program., Langley Research Center.
    The Physical Object
    FormatMicroform
    Pagination48 p.
    Number of Pages48
    ID Numbers
    Open LibraryOL16135229M

    The friction drag of the airfoil with a laminar boundary layer is, whereas in turbulent flow it becomes Sure, this is a 50% increase but only on the friction drag of the airfoil. The other drag contributions are airfoil shape, wind induced drag, tail drag, fuselage and landing gear drag, interference drag, cooling drag and a few more. Question: Laminar Flow Airfoils Have Improved Lift To Drag Characteristics In What AOA Regime? Improved Characteristics In All AOA Regimes Improved Characteristics In Low AOA Regimes Improved Characteristics In High AOA Regimes No Improved Characteristics With Respect To AOA. laminar flow can go) Pitts upper wing: 63A 6 = NACA 6-series 3 = laminar flow as far back as 30% chord A = part of rear airfoil replaced with straight line segment (fabric Special letters & numbers: don’t ask! 3rd #: lift coefficient in tenths at which airfoil was designed for low drag 4th /5 th #: max thickness in # of chord covered aircraft)File Size: KB. 您的位置: 首页 > 国外标准 > 美国国家航空航天局NASA > NASA NASA-TP 商务飞机机翼与自然层流翼型满量程semispan测试.


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Full-scale semispan tests of a business-jet wing with a natural laminar flow airfoil Download PDF EPUB FB2

By Foot Tunnel on a full-scale semispan model to evaluate and document the low-speed, high-lift characteristics of a business-jet class wing that uti-lized the HSNLF(1) airfoil section and a single-slotted flap system.

In addition to the high-lift studies, boundary-layer transition effects were exam-File Size: 2MB. Full-scale semispan tests of a business-jet wing with a natural laminar flow airfoil.

Full-scale semispan tests of a business-jet wing with a natural laminar flow airfoil [microform] / David E. Hahne and Frank L. Jordan, Jr National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Program ; For sale by the National Technical Information Service [Washington, D.C.

Full-scale semispan tests of a business-jet wing with a natural laminar flow airfoil /. A full-scale semispan model was investigated to evaluate and document the low-speed, high-lift characteristics of a business-jet class wing that utilized the HSNLF(1) airfoil section and a single-slotted flap : David E.

Hahne and Jr. Frank L. Jordan. Full-scale semispan tests of a business-jet wing with a natural laminar flow airfoil / (Washington, D.C.: National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Program ; Springfield, Va.

Natural-Laminar-Flow Airfoil Development for a Lightweight Business Jet | Michimasa Fujino, Yuichi Yoshizaki, Yuichi Kawamura | download | B–OK. Download books for free. Find books. A flight-test campaign of a supersonic natural laminar flow airfoil has been recently completed.

The test surface was an inch ( cm) chord and inch ( cm) span article mounted on the centerline store location of an FB airplane (McDonnell Douglas Corporation, now The Boeing Company, Chicago, Illinois).File Size: 4MB.

The airfoil thickness is 15% chord, as desired. The airfoil coordinates are given in Table 1. A comparison between the section characteristics of the NASA NLF(1) airfoil and those of the NACA airfoil at the cruise-flight Reynolds number is presented in Size: KB.

(bacnlf-il) BOEING HSNLF AIRFOIL Boeing high speed natural laminar flow airfoil from a European patent (EP A1) Max thickness % at % chord. Max camber % at % chord Source UIUC Airfoil Coordinates Database Source dat file The dat file is in Lednicer format: BOEING HSNLF AIRFOIL Full text of "Wind-tunnel investigation of a full-scale general aviation airplane equipped with an advanced natural laminar flow wing" See other formats NASA Technical Paper rWNSA National Aeronautics and Space Administration Scientific and Technical Information Division Wind-Tunnel Investigation of a Full- Scale General Aviation Airplane Equipped With an Advanced Natural Laminar.

A full-scale semispan model was investigated to evaluate and document the low-speed, high-lift characteristics of a business-jet class wing that utilized the HSNLF(1) airfoil. Full-scale semispan tests of a business-jet wing with a natural laminar flow airfoil by: Hahne, David E.

Published: () A computer program for estimating the areodynamic characteristics of NACA series airfoils by: Maksymiuk, Catherine M. Published: (). An NLF airfoil, the SHM-1, for a lightweight business jet was developed. The airfoil exhibits a high maximum lift coef” cient, low pro” le drag coef” cients at climb and cruise, and a small nose- down pitching moment coef” cient at high Size: KB.

Mr. Thorpe summed it up quite nicely. The biggest detraction is that the laminar airfoil detaches the flow easier and quicker, thus its gradient between flying one moment and ungracefully wingrocking to earth on another is quite steep compared to a dirty wing.

Full text of "Natural laminar flow experiments on modern airplane surfaces" See other formats. thicknessof14%,4)laminar‘owtoatleastconbothsurfaces withinth elow-dragrang(dragbucket),5)lowe rcorneofthelow- dragrangeata C l of,6) C m inth elow-dragrangnotless.

A selection has been made of NASA documents that will be useful for light and general aircraft. We are providing these to our users as a useful reference source. Munk, Max M.; and Miller, Elton W.: Model Tests with a Systematic Series of 27 Wing Sections at Full Reynolds Number.

NACA Rep.Design and Experimental Results for a Natural-Laminar-Flow Airfoil for General Aviation Applications. NASA TP, Somers D.M. () Subsonic Natural-Laminar-Flow Airfoils.

In: Barnwell R.W Cited by: Natural laminar flow airfoil design considerations for winglets on low-speed airplanes (NASA contractor report) [Van Dam, C. P] on *FREE* shipping on qualifying offers. Natural laminar flow airfoil design considerations for winglets on Author: C.

P Van Dam. The clean-sheet aircraft was created to provide the customer the best value and experience by utilizing advanced technologies, including the aeronautic breakthrough over-the-wing engine mount (OTWEM), a newly developed natural laminar flow (NLF) wing and fuselage nose and a composite fuselage.

The two-element, slotted, natural-laminar-flow (SNLF) airfoil concept is a passive, NLF concept aimed at achieving a high maximum lift coefficient and extensive laminar flow in cruise [1]. The aft element allows favorable pressure gradients over the entire fore element, which results in percent-chord laminar flow on that element,File Size: 1MB.

Natural laminar flow (NLF) is clearly one of the most potentially attractive drag reduction technologies by virtue of its relative simplicity. NLF is achieved passively, that is, Cited by: 6.

LAMINAR FLOW, BY ACCIDENT. During the ’s a self-taught aerodynamicist named David R. Davis went to the trouble of patenting an airfoil design, which he called the “Fluid Foil” (US Patent #1,).He considered his design special because it exhibited lower drag than most other common airfoils, but he wasn’t sure why.

As a substitute to the NASA GA(W)-2 airfoil, that is envisaged for a Light Transport Aircraft (LTA), a new airfoil NAL-MSNLF is designed at NAL.

It is shown according to model calculations that the thicker NAL airfoil shows better aerodynamic efficiency than the GA(W)-2 profile in the operating C L by: 1. as well as full-scale flight testing using a gloved T aircraft (Fig. CS, Full-scale flight testing validated the performance of the airfoil at full-scale Reynolds number and Mach number.

The laminar-to-turbulent boundary-layer transitions were visualized in real time using an infrared (IR) camera during the T flight tests (Fig.

CS). The B bomber's "Davis" airfoil was also a laminar flow airfoil, which predates the Mustang's. However, the designers of the B only knew that their airfoil had very low drag in the wind tunnel.

They did not know that it was a laminar flow airfoil. The boundary layer concept is credited to the great German aerodynamicist, Ludwig Prandtl. Laminar-flow wings, such as the newly unveiled prototypes, have thinner leading edges than conventional aerofoils.

The design could reduce wing friction by half and overall aircraft drag by 8% over a short range, Airbus said, saving up to 5% on fuel costs over a flight of almost 1,km. For the aircraft with lb has a wing area S= ft sq and the value of CL= at L/Dmax, find the sea level airspeed where the minimum drag occurs.

V= knots For the aircraft with lb, find Di, Dp, Dt at (L/D)max. › Image: Laminar Flow Wind Tunnel Test If successful, this technology will help to maintain laminar flow over most of a wing's surface and significantly reduce drag.

This technology could be applied to a new wing design for either the traditional tube-and-wing aircraft or for a BWB. Our airplane is a Gulfstream III business jet, so it. An airfoil (American English) or aerofoil (British English) is the cross-sectional shape of a wing, blade (of a propeller, rotor, or turbine), or sail (as seen in cross-section).

An airfoil-shaped body moving through a fluid produces an aerodynamic force. As noted earlier, the past decade has seen large improvements in wing design technology, the successful demonstration of laminar flow control on a Boeingthe successful demonstration of riblets on a business jet, the successful demonstration of natural laminar flow on a business jet, and the use of supercritical airfoils and winglets on.

Possibly the most widely used airfoil of all time, the NACA combined high lift, low drag, mild pitching moments, and even a bit of laminar flow on its lower surface. It was designed in distribution making DREs feasible.

An airfoil section was designed that suggests NLF (natural laminar flow) is possible at AoA = 0°, with potential for DRE control between AoA = and -1°. Introduction EXAS A&M University has conducted a conceptual design study of a Laminar Flow Control (LFC) flight test.

A natural-Iaminar-flow airfoil, the NLF(1), has been recently designed for general-aviation aircraft at the NASA Langley Research Center. During the design of this airfoil, special emphasis was placed on experiences and observations gleaned Cited by: Airfoil Airfoil. An airfoil is any surface which provides aerodynamic force when it is subjected to a moving flow of air.

This includes the wings of an aircraft, used to generate lift. Further, the term usually refers to the shape of the wing or revolving blade, as seen in the cross-section. A(n) _____ is the point at which the airflow over the wings ceases to be a smooth (laminar) flow and the wing starts to lose lift.

aerodynamic stall An airfoil's efficiency, either a wing or a rotor blade, is _____ at high altitudes by the _____ air density.

The talk about laminar flow wings brought a question: how come the Sea Fury was deemed as a superb carrier plane, while P was not regarded as such by USN.

The Sea Fury having less wing area than Tempest, while the wing thickness to chord ratio was lower than at P Was the flap system of S. Fury better suited for low velocities. Like many others, our custom ‘natural laminar flow’ airfoils have a very flat pressure and velocity distribution, easily maintaining laminar flow up to 60% of the wing ‘chord length’.

Suction is applied beyond this point, which not only stabilizes the boundary layer, but through our proprietary technology, creates ‘pressure thrust. of the Slotted, Natural-Laminar-Flow (SNLF) airfoil concept via wind-tunnel tests.

To compare the SNLF concept with Laminar-Flow Control (LFC) using suction. To develop and validate design tools for both SNLF and LFC airfoils. SNLF Airfoil, SFile Size: 5MB. Tracy was able to demonstrate natural laminar flow at supersonic airspeeds using infrared film and a natural laminar flow airfoil attached to the underside of an F Author: Mark Patiky.Repeat this process creating lines from the edge of the circle to the airfoil starting from the circle and ending at the airfoil (A to A’, B to B’ and C to C’).

The images below show the locations of the points on the airfoil and the points on the circle.I often see images of the boundary layer over a wing indicating the airflow is laminar over the first portion of the wing.

Transition from laminar to turbulent flow over the wing. Left: source, right: source I was also told this cannot happen in a full-scale aircraft, as the Reynolds number involved are not compatible with laminar flow.