Last edited by Kem
Tuesday, July 28, 2020 | History

3 edition of Some low-speed flutter characteristics of simple low-aspect-ration delta wing models found in the catalog.

Some low-speed flutter characteristics of simple low-aspect-ration delta wing models

Robert V. Doggett

Some low-speed flutter characteristics of simple low-aspect-ration delta wing models

by Robert V. Doggett

  • 230 Want to read
  • 28 Currently reading

Published by National Aeronautics and Space Administration, Langley Research Center in Hampton, Va .
Written in English

    Subjects:
  • Airplanes -- Wings, Triangular.,
  • Flutter (Aerodynamics)

  • Edition Notes

    Other titlesSome low speed flutter characteristics of simple low-aspect-ratio delta wing models
    StatementRobert V. Doggett, Jr. and David L. Soistmann.
    SeriesNASA technical memorandum -- 101547
    ContributionsSoistmann, David L., Langley Research Center.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL17097646M

    Variable-Sweep Wings Thin swept wings of low aspect ratio are part of the aerodynamic ingredients of a low-drag supersonic aircraft but, at the same time, yield an aircaft with a relatively low maximum lift-drag ratio at subsonic speeds, as well as certain undesirable handling characteristics in the low-speed, high-angle-of-attack regime. Delta wing history •!Until the s the vast majority of aircraft featured rectangular, trapezoidal or elliptical wings. •!Delta wings started being studied in the s by Alexander Lippisch in Germany. •!Lippisch wanted to create tail-less aircraft, and Delta wings were one of the solutions he Size: 2MB.

    The results confirm that flutter is exhibited at low speed range (under 40 ft/s) for wings more than ft long with several loads. (The Nasa technical report mentions that Helios HP aircraft which experienced the failure was flying at a speed of 37 ft/s just before it experienced the malfunction.) The next necessary step in the analysis Cited by: 3. () Low-speed flutter characteristics of some simple low-aspect-ratio delta-wing models. Journal of Aircraft , Online publication date: 1-MarCited by:

    Computational study of incipient leading-edge separation on a supersonic delta wing. S. Naomi McMillin, James L. Pittman and; Low-speed flutter characteristics of some simple low-aspect-ratio delta-wing models. Robert V. Doggett Jr. and;. parametric studies of swept-wing aircraft and to apply it to study some of the flutter characteristics of composite wings. The program, which is written in FORTRAN IV, includes the effects of rigid-body roll, pitch, and plunge and is applicable to both sym- metric and antisymmetric flutter Size: 5MB.


Share this book
You might also like
Decorating with papercraft

Decorating with papercraft

Bearing the weight

Bearing the weight

New technology in design and manufacture

New technology in design and manufacture

Moores Federal Rules Pamphlets 2002

Moores Federal Rules Pamphlets 2002

Central Africa

Central Africa

Soil survey of the Lower Fraser Valley

Soil survey of the Lower Fraser Valley

Selected topics on functional analysis and categories.

Selected topics on functional analysis and categories.

Bibliography of bioethics, volume 6

Bibliography of bioethics, volume 6

Administrative law and process

Administrative law and process

Hopscotch, Hobos & Foxholes

Hopscotch, Hobos & Foxholes

Laura was my camel

Laura was my camel

role of scent glands in pollination

role of scent glands in pollination

Seniors co-Ownership Demonstration Project. Home Ownership.

Seniors co-Ownership Demonstration Project. Home Ownership.

Key points emerging from the DAC review of development challenges and the role of development co-operation in the three Mekong countries in transition

Key points emerging from the DAC review of development challenges and the role of development co-operation in the three Mekong countries in transition

Companion to the Lectionary

Companion to the Lectionary

Byzantine East and Latin West: two worlds of Christendom in Middle Ages and Renaissance

Byzantine East and Latin West: two worlds of Christendom in Middle Ages and Renaissance

Preparation in anticipation of layoffs

Preparation in anticipation of layoffs

Some low-speed flutter characteristics of simple low-aspect-ration delta wing models by Robert V. Doggett Download PDF EPUB FB2

Flutter characteristics of low-aspect-ratio delta wings are presented. Data are presented which show the effects of sweep angle on the flutter characteristics of some simple plate models of constant planform area. The range of sweep angles studied was from 30 to 72 degrees. In addition, flutter results are pres- ented for two sweep clipped-delta wing models.

Further, results are presented File Size: KB. Some low speed flutter characteristics of simple low-aspect-ratio delta wing models: Responsibility: Robert V. Doggett, Jr.

and David L. Soistmann. Data are presented which show the effects of sweep angle on the flutter characteristics of some simple plate models of constant planform area. The range of sweep angles studied was from 30 to 72 degrees.

In addition, flutter results are presented for two 30 deg-sweep clipped-delta wing : Jr. Robert V. Doggett and David L.

Soistmann. Data are presented which show the effects of sweep angle on the flutter characteristics of some simple plate models of constant planform area. The range of sweep angles studied was from 30 to 72 degrees. In addition, flutter results are presented for two 30 deg-sweep clipped-delta wing : David L.

Soistmann and Jr. Robert V. Doggett. Low-speed flutter characteristics of some simple low-aspect-ratio delta-wing models By Jr. Robert V. Doggett and David L. Soistmann Topics: AIRCRAFT DESIGN, TESTING AND PERFORMANCEAuthor: Jr.

Robert V. Doggett and David L. Soistmann. 30th Structures, Structural Dynamics and Materials Conference. 03 April - 05 April Mobile,AL,U.S.A. Some low-speed flutter characteristics of simple low-aspect-ratio delta wing models. ROBERT DOGGETT, JR.

and; DAVID SOISTMANN. Data are presented which show the effects of sweep angle on the flutter characteristics of some simple plate models of constant planform area. The range of sweep angles studied was from 30 to 72 degrees. In addition, flutter results are presented for two 30 deg-sweep clipped-delta wing models.

Transonic flutter boundaries are presented for two simple, 72 deg. sweep, low-aspect-ratio wing models. One model was an aspect-ratio delta wing; the other model was an aspect-ratio Delta wings are superior only in supersonic flight, and due to their good low speed characteristics they offer the best overall compromise for supersonic aircraft.

North American XB in flight, a classical delta wing design (picture source). Note the canard wing, which has little sweep and a low aspect ratio: This kind of wing is ideal for. wing and delta wing analyses are included in the latest MathCad and Matlab10 version.

Numerous additional plots are available in the original report2. Figure 4 shows the plot of normalized Regier number versus Mach number, for flutter boundary estimation for conventional, moderately swept wings.

The upper solid line indicates the upperFile Size: 95KB. EFFECT OF ROOT FLEXIBILITY ON THE AEROELASTIC ANALYSIS OF A COMPOSITE WING BOX *Gamal M.

Ashawesh, Ali M. Elmabrok Low speed flutter characteristics of some simple low aspect ratio Delta wing models. Proceedings of the 30 AIAA, ASME, ASCE, and AHS, Structures, Structural Dynamics, and Materials Conference, Mobile, AL, T.P.

R.V. Doggett, D.L. Solstmann, Some low-speed flutter characteristics of simple low-aspect-ratio delta wing models, NASA TMJanuary, Google Scholar [3]Cited by: The 'fixed-root' flexure-torsion flutter characteristics of four model wings of different taper ratios have been investigated in the wind tunnel.

The wing inertia axis and the angle of sweepback have been varied on each wing over the ranges c to c and 0 deg to 50 deg respectively. Flutter and the nonlinear limit cycle behavior of flat, low-aspect ratio plates at zero angle of attack have recently been studied (Doggett and Solstmann, ; Tang a, Tang b; Weiliang and Dowell, ).

In Doggett and Solstmann () and Tang et by: Numerical Simulation of the Buffet of a Full Span Delta Wing at High Angle of Attack Low-Speed Flutter Characteristics of Some Simple Low-Aspect-Ratio Delta-Wing Models Jan 1. Introduction. Flutter and limit cycle oscillations (LCO) of plates with free edges representative of some low aspect ratio wings have been studied experimentally by Doggett and Solstmann ().Recently, investigations at low subsonic flow speeds by Tang et al.

(, a,b) have used Von Karman plate equations and a three-dimensional time domain vortex lattice aerodynamic model and Cited by: Low speed flutter characteristics of some simple low aspect ratio Delta wing models. Proceedings of the 30 AIAA, ASME, ASCE, and AHS, Structures, Structural Dynamics, and Materials Conference, Mobile, AL, T.P.[3] thG.A.

Georghiades and J.R. Banerjee:Flutter prediction for composite wings using parametric studies. To find the flutter speed, the system (9) is solved for a set of increasing velocities. If all feasible solutions have negative real part, the speed is considered to be subcritical and the system is concluded to be stable.

The flutter speed is reached when some eigenvalue has a zero or positive real by: 6. When conducting flutter analysis on a wing, it is common to simply constrain the root of the wing to be fixed. When conducting a flutter analysis on a full aircraft however, it is very important to consider how the dynamics of the rigid body motion can also couple with the structural and aerodynamics of the model.

Flutter modes of high aspect ratio tailless aircraft. Banerjee ; J. Banerjee. The City University, London, England, UK. Search for more papers by this author Published Online: 22 May Cited by:. The present paper aims to investigate flutter phenomenon for cropped delta wing with an external store using numerical and experimental methods in a subsonic and incompressible flight regime.

Wing structure is modeled based on von Kármán plate theory. The unsteady vortex lattice method is applied to wing aerodynamic model and a slender-body theory is used for store aerodynamic by: 5. Flutter effect on a wing model. With a LOT of help from my friends Marija A., Martynas K.

& Tadas V. (for those of you who care I did not litter. I picked the wing and pieces of it after that).Report presenting an investigation to obtain a survey of the flying characteristics at low speeds of models with low-aspect-ratio delta wings.

Four models with triangular plan-form sweptback wings and five models with the tips cut off to give taper ratios were tested. Results regarding the stability and control characteristics of each of the models is by: 1.