Three-dimensional Laminar Boundary-layer Analysis of Upwash Patterns and Entrained Vortex Formation on Sharp Cones at Angle of Attack

Three-dimensional Laminar Boundary-layer Analysis of Upwash Patterns and Entrained Vortex Formation on Sharp Cones at Angle of Attack PDF

Author: John C. Adams (Jr.)

Publisher:

Published: 1971

Total Pages: 124

ISBN-13:

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Application of three-dimensional inviscid and viscous (laminar boundary layer) analyses for cold wall hypersonic flows over sharp cones at incidence is presented relative to experimental data, showing surface upwash angles and entrained vortex formation leading to crossflow-induced boundary-layer transition. Three-dimensional neutral inviscid stability theory for stationary disturbances is used to calculate the angular orientation of the entrained vortices in the boundary layer while a maximum crossflow Reynolds number concept is applied for correlation of the onset to vortex formation due to crossflow instability.

Three-Dimensional Laminar Boundary-Layer Analysis of Upwash Patterns and Entrained Vortex Formation on Sharp Cones at Angle of Attack

Three-Dimensional Laminar Boundary-Layer Analysis of Upwash Patterns and Entrained Vortex Formation on Sharp Cones at Angle of Attack PDF

Author:

Publisher:

Published: 1971

Total Pages: 0

ISBN-13:

DOWNLOAD EBOOK →

Application of three-dimensional inviscid and viscous (laminar boundary layer) analyses for cold wall hypersonic flows over sharp cones at incidence is presented relative to experimental data, showing surface upwash angles and entrained vortex formation leading to crossflow-induced boundary-layer transition. Three-dimensional neutral inviscid stability theory for stationary disturbances is used to calculate the angular orientation of the entrained vortices in the boundary layer while a maximum crossflow Reynolds number concept is applied for correlation of the onset to vortex formation due to crossflow instability.

Three-Dimensional Laminar Boundary-Layer Analysis of Upwash Patterns and Entrained Vortex Formation on Sharp Cones at Angle of Attack

Three-Dimensional Laminar Boundary-Layer Analysis of Upwash Patterns and Entrained Vortex Formation on Sharp Cones at Angle of Attack PDF

Author:

Publisher:

Published: 1971

Total Pages: 0

ISBN-13:

DOWNLOAD EBOOK →

Application of three-dimensional inviscid and viscous (laminar boundary layer) analyses for cold wall hypersonic flows over sharp cones at incidence is presented relative to experimental data, showing surface upwash angles and entrained vortex formation leading to crossflow-induced boundary-layer transition. Three-dimensional neutral inviscid stability theory for stationary disturbances is used to calculate the angular orientation of the entrained vortices in the boundary layer while a maximum crossflow Reynolds number concept is applied for correlation of the onset to vortex formation due to crossflow instability.

Analysis of the Three-dimensional Compressible Turbulent Boundary Layer on a Sharp Cone at Incidence in Supersonic and Hypersonic Flow

Analysis of the Three-dimensional Compressible Turbulent Boundary Layer on a Sharp Cone at Incidence in Supersonic and Hypersonic Flow PDF

Author: John C. Adams

Publisher:

Published: 1972

Total Pages: 98

ISBN-13:

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An analytical approach toward numerical calculation of the three-dimensional turbulent boundary layer on a sharp cone at incidence under supersonic and hypersonic flow conditions is presented. The theoretical model is based on implicit finite-difference integration of the governing three-dimensional turbulent boundary-layer equations in conjunction with a three-dimensional scalar eddy-viscosity model of turbulence. Comparison is made of present theory with detailed experimental measurements of the three-dimensional turbulent boundary-layer structure (velocity and temperature profiles), the surface streamline direction (obtained via an oil-flow technique) and surface heat-transfer rate.

Three Dimensional Flow Studies Over a Spinning Cone at Angle of Attack

Three Dimensional Flow Studies Over a Spinning Cone at Angle of Attack PDF

Author: H. A. Dwyer

Publisher:

Published: 1974

Total Pages: 36

ISBN-13:

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Calculation of the boundary layer induced Magnus force on a spinning cone is given. A new technique to calculate the laminar boundary layer flow over a spinning cone at small angles of attack has been developed, and has yielded the information needed to calculate the Magnus force. The results include both the centrifugal pressure gradient and crossflow wall shear contributions to the Magnus force, and also give the boundary layer displacement thicknesses. (Modified author abstract).

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