Download or read book Subsonic Lifting Surface Flutter Analysis written by Gary L. Merritt and published by . This book was released on 1971 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Subsonic Lifting Surface Theory Aerodynamics and Flutter Analysis of Interfering Wing Horizontal Tail Configurations Part II Wing Tail Flutter Correlation Study written by E. Albano and published by . This book was released on 1970 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Subsonic Lifting Surface Theory Aerodynamics and Flutter Analysis of Interfering Wing Horizontal Tail Configurations Part I Subsonic Oscillatory Aerodynamics for Wing Horizontal Tail Configurations written by E. Albano and published by . This book was released on 1970 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Subsonic and Supersonic Flutter Analysis of a Highly Tapered Swept wing Planform Including Effects of Density Variation and Finite Wing Thickness and Comparison with Experiments written by E. Carson Yates (Jr.) and published by . This book was released on 1967 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: The flutter characteristics of several wings with an aspect-ratio of 4.0, a taper ratio of 0.2, and a quarter-chord sweepback of 45 deg. have been investigated analytically for Mach numbers up to 2.0. The calculations were based on the modified-strip-analysis method, the subsonic-kernel-function method, piston theory, and quasi-steady second-order theory. Results of t h e analysis and comparisons with experiment indicated that: (1) Flutter speeds were accurately predicted by the modified strip analysis, although accuracy at t h e highest Mach numbers required the use of nonlinear aerodynamic theory (which accounts for effects of wing thickness) for the calculation of the aerodynamic parameters. (2) An abrupt increase of flutter-speed coefficient with increasing Mach number, observed experimentally in the transonic range, was also indicated by the modified strip analysis. (3) In the low supersonic range for some densities, a discontinuous variation of flutter frequency with Mach number was indicated by the modified strip analysis. An abrupt change of frequency appeared experimentally in the transonic range. (4) Differences in flutter-speed-coefficient levels obtained from tests at low supersonic Mach numbers in two wind tunnels were also predicted by the modified strip analysis and were shown to be caused primarily by differences in mass ratio. (5) Flutter speeds calculated by the subsonic-kernel-function method were in good agreement with experiment and with the results of the modified strip analysis. (6) Flutter speed obtained from piston theory and from quasi-steady second-order theory were higher than experimental values by at least 38 percent.
Download or read book Subsonic Aerodynamic and Flutter Characteristics of Several Wings Calculated by the SOUSSA P1 1 Panel Method written by Edward Carson Yates and published by . This book was released on 1982 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Comparisons of Some Wing Flutter Characteristics Obtained by Modified Strip Analysis Subsonic Kernel Function and Experiment written by Edward Carson Yates and published by . This book was released on 1964 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Application of a Supersonic Kernel function Procedure to Flutter Analysis of Thin Lifting Surfaces written by Herbert J. Cunningham and published by . This book was released on 1970 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: A description is presented of a systematic procedure for obtaining generalized aerodynamic forces from the lifting-surface theory by the supersonic kernel-function method and for using those forces thus obtained in a Galerkin modal flutter analysis. The method is applicable to planforms with subsonic leading and supersonic trailing edges. Analytical flutter results were obtained and compared with experimental values from three flutter models.
Download or read book Subsonic Lifting Surface Analysis with Static Aeroelastic Effects written by Larry Glenn Pearson and published by . This book was released on 1972 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A computer program was coded to obtain static aeroelastic effects on simple planforms through the use of subsonic lifting surface theory. The program was divided into two major technical areas, aerodynamic and structural, with matrix notation used to indicate the influence of each in the final aerodynamic loading distribution. Several typical stability derivatives were then obtained to make an accurate stability and control analysis on the desired planform. (Author).
Download or read book Some Concepts and Problems Areas in Aircraft Flutter written by Isadore Edward Garrick and published by . This book was released on 1957 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Generalization of the Subsonic Kernel Function in the S Plane with Applications to Flutter Analysis written by Herbert J. Cunningham and published by . This book was released on 1984 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Application of a Supersonic Kernel function Procedure to Flutter Analysis of Thin Lifting Surfaces written by Herbert J. Cunningham and published by . This book was released on 1970 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: A description is presented of a systematic procedure for obtaining generalized aerodynamic forces from the lifting-surface theory by the supersonic kernel-function method and for using those forces thus obtained in a Galerkin modal flutter analysis. The method is applicable to planforms with subsonic leading and supersonic trailing edges. Analytical flutter results were obtained and compared with experimental values from three flutter models.
Download or read book NASA Technical Note written by and published by . This book was released on 1974 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Developments in Subsonic Lifting Surface Theory written by B. L. Hewitt and published by . This book was released on 1969 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Comparative Evaluation of Methods for Predicting Flutter and Divergence of Unswept Wings of Finite Span written by Edward Carson Yates and published by . This book was released on 1963 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Subsonic Unsteady Aerodynamics for General Configurations Part 2 Volume 1 Application of the Doublet Lattice Method and the Method of Images to Lifting Surface Body Interference written by and published by . This book was released on 1972 with total page 255 pages. Available in PDF, EPUB and Kindle. Book excerpt: A technique for predicting steady and oscillatory aerodynamic loads on general configurations has been developed which is based on the Doublet- Lattice Method and the method of images. Chord- and spanwise loading on lifting surfaces and longitudinal body load distributions are determined. Configurations may be composed of an assemblage of bodies (elliptic cross sections and a distribution of width or radius) and lifting surfaces (arbitrary planform and dihedral, with or without control surfaces). Loadings predicted by this method are required for flutter, gust, frequency response and static aeroelastic analyses and may be used to determine static and dynamic stability derivatives. The methods described in this report are intended to be used by airplane designers to calculate with improved accuracy, the unsteady aerodynamic pressures that act on a lifting surface being propelled at subsonic speeds. The new feature of these calculations is that the effects on the pressure field induced by interference between the fuselage, for example, and the wing or the wing, pylon and nacelle, are taken into account. These calculations are an essential ingredient of flutter analyses and will improve the confidence level of such calculations in preventing wing-store flutter and flutter of advanced vehicles where fuselages are relatively large, provide some lifting capability and cause noticeable interference effects.
Download or read book Flutter Analysis of a Cascade of Staggered Blades in Subsonic Flow written by Louis Kronenberger (Jr) and published by . This book was released on 1977 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this report is to utilize a numerical lifting surface theory developed by Rao and Jones to predict the unsteady airloads on an infinite cascade of staggered blades in subsonic compressible flow. An investigation is conducted to determine the effect on the unsteady airloads when parameters such as reduced frequency, interblade stagger angle, interblade spacing, and interblade phase lag are varied over a specific range of values. Once the unsteady airloads have been determined, they are used to perform an aeroelastic analysis of the staggered cascade for a single degree of freedom in torsion and a two degree of freedom system is bending and torsion. Results of the single degree of freedom analysis yields flutter boundaries. A new general flutter program is developed for the two degree of freedom system. The iterative procedure of the flutter program yields the flutter frequency and speed of the cascade reference airfoil as a function of the cascade parameters.
Download or read book Some Remarks on Multhopp s Subsonic Lifting Surface Theory written by K. W. Mangler and published by . This book was released on 1952 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
