Download or read book Vortex Separation on Slender Bodies of Elliptic Cross Section written by Leon H. Schindel and published by . This book was released on 1967 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: The lift on slender bodies at high angle of attack is strongly influenced by the separation of a pair of vortices from the lee side. An analytical model of the vortex separation was developed which predicts the vortex development and the consequent nonlinear lift distribution on bodies of elliptic cross section and very general longitudinal contour. The report describes comparisons of the theory with subsonic wind tunnel tests on families of body shapes. Nose contours included pointed ogives, blunt ogives, and hemispheres. Body fineness ratios from 4 to 15 were tested and cross sections from circular to 3.5:1 ellipses. In addition the elliptic bodies were tested with major axes in and normal to the pitch plane. All cases were run with and without boundary layer trips at angle of attack up to 28 degrees. Vortex trajectories, obtained from the behavior of tuft grids, were in general agreement with theory. Normal force and pitching moment predictions also agreed with experiment until the theory failed at high angles of attack. Limitations on the validity of the analysis were thus experimentally established. The predicted locations of separation were generally quite far around to leeward from the positions measured by a China clay technique. (Author).

Download or read book Effect of Vortex Separation on Lifting Bodies of Elliptic Gross Section written by Leon H. Schindel and published by . This book was released on 1965 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: The lift on slender bodies at high angle of attack is strongly influenced by the separation of a pair of vortices from the lee side. Of the various possible methods for taking account of this vortex separation, that proposed by Bryson seems to incorporate the main features of the flow in the simplest mathematical form. In this model, the separated vortices are joined to the body by straight feeding sheets. Bryson gives solutions for the vortex strength and position as a function of time or distance along the body and calculates the resulting body normal force for circular cones and cylinders. These solutions are extended here to cambered bodies of elliptic cross section having arbitrary nose contour. Calculation of the development of the separated vortices requires specification of the angular position around the body at which the feeding sheet departs. The position of this separation line is determined here from a correlation of experimental results. An analytic procedure is also described, but its accuracy is considered to be inadequate. In order to complete the theory, the initial growth of the vortices as they first leave the surface must also be prescribed. Vorticity is assumed to accumulate within the boundary layer until it separates upon reaching a certain finite strength which depends on whether the boundary layer is laminar or turbulent at separation.

Download or read book Effect of Vortex Separation on Lifting Bodies of Elliptic Cross Section written by Leon H. Schindel and published by . This book was released on 1965 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Aerodynamics of Delta Wings of Elliptical Cross section with Separated Flow written by Joint Institute for Aeronautics and Acoustics. Joint Institute for Aeronautics and Acoustics and published by . This book was released on 1985 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Calculation of Symmetric and Asymmetric Vortex Separation on Cones and Tangent Ogives Based on Discrete Vortex Models written by S. Chin and published by . This book was released on 1988 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Store Separation written by Bertha M. Ryan and published by . This book was released on 1973 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book NASA Technical Memorandum written by and published by . This book was released on 1990 with total page 716 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Calculation of Symmetric and Asymmetric Vortex Seperation on Cones and Tangent Ogives Based on Discrete Vortex Models written by and published by . This book was released on 1988 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Selective Bibliography on High angle of attack Aerodynamics of Aircraft and Aircraft Components at Subsonic Speeds written by Henry W. Woolard and published by . This book was released on 1974 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book NASA Technical Report written by and published by . This book was released on 1977 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Theoretical Analysis of Total pressure Loss and Airflow Distribution for Tubular Turbojet Combustors with Constant Annulus and Liner Cross sectional Areas written by A. J. Eggers and published by . This book was released on 1958 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Prediction of Vortex Shedding from Circular and Noncircular Bodies in Supersonic Flow written by M. R. Mendenhall and published by . This book was released on 1984 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book U S Government Research Development Reports written by and published by . This book was released on 1966 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Prediction of Vortex Shedding from Circular and Noncircular Bodies in Subsonic Flow written by M. R. Mendenhall and published by . This book was released on 1987 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Prediction of Vortex Shedding from Circular and Noncircular Bodies in Subsonic Flow written by Michael R. Mendenhall and published by . This book was released on 1987 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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