Calculation Of Laminar Separation With Free Interaction By The Method Of Integral Relations Part Ii Two Dimensional Supersonic Nonadiabatic Flow And Axisymmetric Supersonic Adiabatic And Nonadiabatic Flows PDF Download
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Author | : Jack Norman Nielsen |
Publisher | : |
Total Pages | : 92 |
Release | : 1966 |
Genre | : Aerodynamic heating |
ISBN | : |
Download Calculation of Laminar Separation with Free Interaction by the Method of Integral Relations Book in PDF, ePub and Kindle
"A calculative method is presented for determining separated, laminar, boundary-layer characteristics from in front of the separation point to the reattachment point under the influence of 'free interaction' between the main flow and the boundary layer. The analysis covers supersonic flow over two-dimensional and axisymmetric configurations with adiabatic or nonadiabatic wall conditions. For nonadiabatic wall conditions, theories based on first-order coupling and second-order coupling between velocity and total temperature profiles were presented. The theory based on first-order coupling was included in a machine calculation program with options for two-dimensional or axisymmetric flow and adiabatic or nonadiabatic wall conditions. Extensive systematic calculations were made to determine the range of possible separated flows over a two-dimensional configuration as a function of separation point location and wall temperatures. Comparison between experiment and theory for separation pressure distributions on two-dimensional or axisymmetric adiabatic configurations shows generally good agreement. Good comparison between experiment and theory is indicated for a moderately-cooled axisymmetric configuration. For a highly-cooled axisymmetric configuration, the prediction of the machine program based on first-order coupling is inadequate, indicating the necessity for a higher-order coupling theory." -- page iii.
Author | : Jack N. NIELSEN |
Publisher | : |
Total Pages | : 91 |
Release | : 1966 |
Genre | : |
ISBN | : |
Download Calculation of Laminar Separation with Free Interaction by the Method of Integral Relations. Part Ii. Two-dimensional Supersonic Nonadiabatic Flow and Axisymmetric Supersonic Adiabatic and Nonadiabatic Flows Book in PDF, ePub and Kindle
A alculative method is presented for determining separated, laminar, boundary-layer characteristics from in front of the separation point to the reattachment point under the influence of 'free interaction' between the main flow and the boundary layer. The analysis covers supersonic flow over two-dimensional and axisymmetric configurations with adiabatic or nonadiabatic wall conditions. For nonadiabatic wall conditions, theories based on first-order coupling and second-order coupling between velocity and total temperature profiles were presented. The theory based on first-order coupling was included in a machine calculation program with options for two-dimensional or axisymmetric flow and adiabatic or nonadiabatic wall conditions. Extensive systematic calculations were made to determine the range of possible separated flows over a two-dimensional configuration as a function of separation point location and wall temperatures. Comparison between experiment and theory for separation pressure distributions on two -dimensional or axisymmetric adiabatic configurations shows generally good agreement. (Author).
Author | : Jack N. Nielsen |
Publisher | : |
Total Pages | : |
Release | : 1966 |
Genre | : |
ISBN | : |
Download Calculation of Laminar Separation with Free Interaction by the Method of Integral Relations. Pt. 2. Two-dimensional Supersonic Nonadiabatic Flow and Axisymmetric Supersonic Adiabatic and Nonadiabatic Flows Book in PDF, ePub and Kindle
Author | : |
Publisher | : |
Total Pages | : 760 |
Release | : |
Genre | : Science |
ISBN | : |
Download Technical Abstract Bulletin Book in PDF, ePub and Kindle
Author | : |
Publisher | : |
Total Pages | : 892 |
Release | : 1974 |
Genre | : Aeronautics |
ISBN | : |
Download NASA Technical Note Book in PDF, ePub and Kindle
Author | : Jack N. Nielsen |
Publisher | : |
Total Pages | : 121 |
Release | : 1965 |
Genre | : |
ISBN | : |
Download Calculation of Laminar Separation with Free Interaction by the Method of Integral Relations. Part I. Two-dimensional Supersonic Adiabatic Flow Book in PDF, ePub and Kindle
Methods are presented for calculating the laminar boundary-layer flow through separation to reattachment under the influence of a prescribed pressure gradient or, in the case of a supersonic main stream, under the influence of 'free interaction' between the boundary layer and the main flow. The present method is based on the Dorodnitsyn method of integral relations and uses a rational velocccity profile which accounts properly for the separation singularity. As a result, the possibility of higher approximations is inherent in the method. The calculated solution for free interaction goes smoothly through the separation point and is in good agreement with certain features of the Navier-Stokes solution in the neighborhood of separation. Good agreement is exhibited between experimental and calculated pressure distributions up to reattachment for the several cases for which the comparisons were made. A computer program based on the work was prepared for two-dimensional flow. It is planned to continue the work to cover nonadiabatic boundary layers and axisymmetric bodies. (Author).
Author | : |
Publisher | : |
Total Pages | : 1040 |
Release | : 1973 |
Genre | : Aeronautics |
ISBN | : |
Download Scientific and Technical Aerospace Reports Book in PDF, ePub and Kindle
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Author | : |
Publisher | : |
Total Pages | : 1336 |
Release | : 1966 |
Genre | : Government publications |
ISBN | : |
Download Government-wide Index to Federal Research & Development Reports Book in PDF, ePub and Kindle
Author | : John M. Klineberg |
Publisher | : |
Total Pages | : 108 |
Release | : 1974 |
Genre | : Boundary layer |
ISBN | : |
Download The Numerical Calculation of Laminar Boundary-layer Separation Book in PDF, ePub and Kindle
Iterative finite-difference techniques are developed for integrating the boundary-layer equations, without approximation, through a region of reversed flow. The numerical procedures are used to calculate incompressible laminar separated flows and to investigate the conditions for regular behavior at the point of separation. Regular flows are shown to be characterized by an integrable saddle-type singularity that makes it difficult to obtain numerical solutions which pass continuously into the separated region. The singularity is removed and continuous solutions ensured by specifying the wall shear distribution and computing the pressure gradient as part of the solution. Calculated results are presented for several separated flows and the accuracy of the method is verified. A computer program listing and complete solution case are included.
Author | : Mitchel H.. Bertram |
Publisher | : |
Total Pages | : 580 |
Release | : 1969 |
Genre | : Compressibility |
ISBN | : |
Download Compressible Turbulent Boundary Layers Book in PDF, ePub and Kindle