Download or read book A New Transformation and Integration Scheme for the Compressible Boundary Layer Equations and Solution Behavior at Separation written by Mark Drela and published by . This book was released on 1983 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new coordinate and variable transformation for the two-dimensional boundary layer equations is presented. The normal coordinate is stretched with a scaling length determined by the local solution. The boundary layer thickness is then essentially constant in computational space for the most types of flows, including separation bubbles and rapidly growing turbulent boundary layers. Similarity solutions can be obtained for all wedge flows. Two finite difference schemes are presented: the Shifted Box Scheme and the Double-Shifted Box Scheme. Both schemes are more resistant to streamwise profile oscillations than the standard Keller's Box Scheme. All governing equations, including the turbulence model, are solved simultaneously as a fully coupled system. This is faster and more robust than conventional weak-coupling iteration schemes. The solution scheme implementation presented makes no restriction on one boundary condition. Any point or integral quantity such as edge velocity, wall shear, displacement thickness, or some functional relationship between two or more of such quantities can be prescribed. The behavior of the boundary layer solution near separation is investigated. It is demonstrated that non-unique solutions always exist whenever an adverse pressure gradient is specified. This bifurcation of the solution is responsible for inability of calculations with prescribed pressure or edge velocity to be carried past separation.
Download or read book New Transformaton and Integration Scheme for the Compressible Boundary Layer Equations and Solution Behavior at Separation written by Massachusetts Institute of Technology. Gas Turbine & Plasma Dynamics Laboratory and published by . This book was released on 1983 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Contractor Report written by and published by . This book was released on 1988 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Numerical Method for Computing Unsteady 2 D Boundary Layer Flows written by Andreas Krainer and published by . This book was released on 1988 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Numerical Solutions of Compressible Semisimilar Boundary Layer Equations Including Separation written by Sung Kyu Kim and published by . This book was released on 1982 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Collection of Technical Papers written by and published by . This book was released on 1984 with total page 1016 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Finite Volume Solution of the Compressible Boundary layer Equations written by Bernard Loyd and published by . This book was released on 1986 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Numerical Integration of the Laminar Compressible Boundary Layer Equations with Special Reference to the Position of Separation when the Wall is Cooled written by G. E. Gadd and published by . This book was released on 1952 with total page 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 542 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on with total page 1386 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Asymptotic Approach to the Separation of Two dimensional Laminar Boundary Layers written by Joseph P Nenni and published by . This book was released on 1976 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Numerical Integration of the Laminar Compressible Boundary Layer Equations with Special Reference to the Position of Separation when the Wall is Cooled written by Aeronautical Research Council and published by . This book was released on 1957 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1971 with total page 804 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monthly Catalog of United States Government Publications Cumulative Index written by United States. Superintendent of Documents and published by . This book was released on 1976 with total page 1466 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of a Finite difference Method for Computing a Compressible Laminar Boundary Layer with Interaction written by Er-Yung Yu and published by . This book was released on 1960 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Numerical Solution of the Compressible Boundary Layer Equations Over Axisymmetric Surfaces written by Charles R. Blake and published by . This book was released on 1976 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt: A numerical solution of the compressible boundary layer equations was developed for flows over either two-dimensional or axisymmetric surfaces. The solution method is capable of solving for boundary layer parameters in either laminar or turbulent flows. In the case of turbulent flow, closure is achieved by use of a two-layered eddy viscosity model. The boundary layer equations are solved by a numerical marching procedure. A Mangler-Levy-Lees transformation of independent variables is used to improve the efficiency of the numerical solution. The transformed boundary layer equations are then linearized by a three point finite difference scheme. The linearized equations are solved by a matrix solution technique. Comparisons of computed boundary layer parameters with experimentally determined parameters were made for both laminar and turbulent flows over axisymmetric bodies. The comparisons show the numerical solution to be very accurate. (Author).
Download or read book Integral Methods in the Theory of the Boundary Layer written by Lev Gerasimovich Loĭt͡si͡anskiĭ and published by . This book was released on 1944 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: The application of the well-known basic principle of mechanics, the principle of Jourdain, to problems of the theory of the boundary layer leads to an equation from which the equations of Von Karman, Leibenson, and Golubev are derived as special cases. The given equation may be employed in other integral methods. The present paper deals with the method of the variation of the thickness of the boundary layer. A number of new approximate formulas valuable in aerodynamic calculations for the fristion distribution are derived from this procedure. The method has been applied only to laminar boundary layers, but it seems probable that it may be generalized to include turbulent layers as well.
