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Monday, August 3, 2020 | History

2 edition of design of supercritical wings by the use of three-dimensional transonic theory found in the catalog.

design of supercritical wings by the use of three-dimensional transonic theory

Michael J Mann

design of supercritical wings by the use of three-dimensional transonic theory

by Michael J Mann

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  • 30 Currently reading

Published by National Aeronautics and Space Administration, Scientific and Technical Information Office, for sale by the National Technical Information Service in [Washington], Springfield, Va .
Written in English

    Subjects:
  • Airplanes -- Wings, Swept-back -- Design and construction,
  • Airplanes, Military,
  • Aerodynamics, Transonic

  • Edition Notes

    StatementMichael J. Mann, Langley Research Center
    SeriesNASA technical paper ; 1400
    ContributionsUnited States. National Aeronautics and Space Administration. Scientific and Technical Information Office
    The Physical Object
    Pagination30 p. :
    Number of Pages30
    ID Numbers
    Open LibraryOL14932311M

    Full text of "An artificial viscosity method for the design of supercritical airfoils" See other formats. @article{osti_, title = {Transonic flow theory of airfoils and wings}, author = {Garabedian, P R}, abstractNote = {Supercritical wing technology is expected to have a significant influence on the next generation of commercial aircraft. Computational fluid dynamics is playing a central role in the development of new supercritical wing.

    Aerodynamic design for improved maneuverability by use of three-dimensional transonic theory. Washington, D.C.: National Aeronautics and Space Administration, Scientific and Technical Information Branch ; [Springfield, Va.   The goal of aerodynamic design for airfoils and wings is to improve the performance of the lifting surfaces, e.g., by minimizing the drag. In this chapter the approaches are assessed by application to the design of transonic RAE airfoil and ONERA M6 wing. An iterative procedure for three-dimensional transonic wing design by the Author: Mengmeng Zhang, Arthur William Rizzi.

    The development of sweep theory resulted in the swept wing design used by most modern jet aircraft, as this design performs more effectively at transonic and supersonic speeds. In its advanced form, sweep theory led to the experimental oblique wing concept. Adolf Busemann introduced the concept of the swept wing and presented this in at. Iterative solution of transonic flows over airfoils and wings, including flows at mach 1 L. CARLSON and W. ANDERSON A combined direct/inverse three-dimensional transonic wing design method for vector computers, P. SMITH and R. HICKS Supercritical wing design using numerical optimization and comparisons with Cited by:


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Design of supercritical wings by the use of three-dimensional transonic theory by Michael J Mann Download PDF EPUB FB2

Design of supercritical wings by the use of three-dimensional transonic theory. [Washington]: National Aeronautics and Space Administration, Scientific and Technical Information Office ; Springfield, Va.: For sale by the National Technical Information Service, (OCoLC) Material Type: Government publication, National government publication.

INTRODUCTION The early methods developed for the design of swept wings at transonic speeds relied almost entirely on linear theory (refs. 1 to 6). The successful use of linear theory for the design of high-aspect-ratio transonic configura- tions is reported in references 5 and 6.

Design of supercritical swept wings. Paul Garabedian and Aerodynamic design for improved maneuverability by the use of three-dimensional transonic theory. A cost-effective method for shock-free supercritical wing by: The design of supercritical wings by the use of three-dimensional transonic theory / By Michael J.

Mann and United States. National Aeronautics and Space Administration. A procedure was developed for the design of transonic wings by the iterative use of three dimensional, inviscid, transonic analysis methods. The procedure was based on simple principles of supersonic flow and provided the designer with a set of guidelines for the systematic alteration of wing profile shapes to achieve some desired pressure : M.

Mann. Publisher Summary. This chapter presents a transonic flow analysis of swept-wings based on an asymptotic theory for high aspect ratio (AR). It also presents examples involving supercritical component flows, with and without embedded shocks. The chapter presents a comparison of the results with data from computer codes based on full-potential.

Iterative three-dimensional transonic wing design using integral equations. Takanashi ; Aerodynamic design for improved maneuverability by the use of three-dimensional transonic theory. Computational transonic design procedure for three-dimensional wings Cited by: Called the supercritical airfoil, the design has led to development of the supercritical wings (SCW) now used worldwide on business jets, airliners and transports, and numerous military aircraft.

Conventional wings are rounded on top and flat on the Size: KB. Successes in reducing the wave drag on airfoils in transonic flow have led to a substantial demand for codes to analyze and design supercritical wing sections.

There is also interest in three-dimensional configurations and in cascades of airfoils such as occur in the theory of turbomachinery [10].Author: P R Garabedian. A review is given of current methods in theoretical aerodynamics which are useful in the design of aircraft wings for subsonic and transonic speeds.

These are of two basic types: (A) direct methods for calculating the flow over a given wing shape. In the design process, these can be used to obtain a rapid estimate of the effect of a specified Cited by: 4.

use of two-dimensional transonic theory (ref. 9) and simple sweep theory. To illus- trate the application of the three-dimensional transonic theory to improved maneuver performance, pressure distributions at supercritical conditions and high lift have been calculated for all four wings.

The calculated pressure gradients and shock waves are then related to the experimental lift and drag performance of each wing atCited by: 1. Transonic Aerodynamics of Airfoils and Wings Introduction Transonic flow occurs when there is mixed sub- and supersonic local flow in the same flowfield (typically with freestream Mach numbers from M = or to ).

Usually the supersonic region of the flow is terminated by a shock wave, allowing the flow to slow down to subsonic File Size: 2MB. still in use today for preliminary design work at Boeing. The concept of a yawed flying wing for supersonic cruise was the subject of intensive studies at NASA fiften years later, but no viable design emerged.

In the meanwhile Paul continued his studies of supercritical wing design, issuing a third book Supercritical Wing Section III in [9].File Size: KB. This banner text can have markup. web; books; video; audio; software; images; Toggle navigation. The objective of the present study is to explain the evolution of the transonic buffet phenomenon from two-dimensional airfoils to three-dimensional swept wings by a global stability analysis.

[Mason] transonic aerodynamics of airfoils and wings 1. W.H. Mason 4/12/04 7. Transonic Aerodynamics of Airfoils and Wings Introduction Transonic flow occurs when there is mixed sub- and supersonic local flow in the same flowfield (typically with freestream Mach numbers from M = or to ).

Supercritical Airfoil and Wing Design Supercritical Airfoil and Wing Design Sobieczky, H; Seebass, A R The need for higher efficiency has forced the operating conditions of modern transport aircraft into the high subsonic speed regime.

For turbojet-powered aircraft, which enjoy a propulsive efficiency proportional to the flight Mach number, the overall aircraft efficiency.

In order to outline the differences between two-dimensional and three-dimensional buffet, the analysis and comparison of four different experimental databases of three-dimensional wings is performed. supercritical wing[¦süpər′kridəkəl ′wiŋ] (aerospace engineering) A wing developed to permit subsonic aircraft to maintain an efficient cruise speed very close to the speed of sound; the middle portion of the wing is relatively flat with substantial downward curvature near the trailing edge; in addition, the forward region of the lower.

Historical Background and Design Evolution of the Transonic Aircraft Tec hnology Supercritical WIng Author: Theodore G. Ayers and James B. Hallissy Subject: NASA TM Keywords: Supercritical wing, Maneuverability Created Date: 8/24/ AM.

Today, supercritical wings are used in commercial, business and military aircraft all over the world. Gregg says all Boeing commercial and military transports use the technology.

Benefits “The ability to have a thicker wing as a result of incorporating supercritical wings .A supercritical airfoil is an airfoil designed primarily to delay the onset of wave drag in the transonic speed range.

Supercritical airfoils are characterized by their flattened upper surface, highly cambered ("downward-curved") aft section, and larger leading-edge radius compared with NACA 6-series laminar airfoil shapes.

Standard wing shapes are designed to create lower pressure over the.Compared to existing wings of the time, the NASA Supercritical Airfoil was flatter on top, rounder on the bottom, and incorporated a little lip on the trailing edge.