Author: C. F. Lo
Publisher:
ISBN:
Category : Aerofoils
Languages : en
Pages : 46
Book Description
The lift interference was calculated for a porous wall wind tunnel by a modified method of block cyclic reduction. This efficient, numerical method has indicated its accuracy by comparison with other available analytical and approximate solutions. A scheme is introduced to search for optimum wall configurations. The lift interference computed for an NACA 64-series finite airfoil in some optimum configurations has demonstrated the achievement of minimization of interference. The effect of test section length is also examined. (Author).
Calculation of Interference for a Porous Wall Wind Tunnel by the Method of Block Cyclic Reduction
Author: C. F. Lo
Publisher:
ISBN:
Category : Aerofoils
Languages : en
Pages : 46
Book Description
The lift interference was calculated for a porous wall wind tunnel by a modified method of block cyclic reduction. This efficient, numerical method has indicated its accuracy by comparison with other available analytical and approximate solutions. A scheme is introduced to search for optimum wall configurations. The lift interference computed for an NACA 64-series finite airfoil in some optimum configurations has demonstrated the achievement of minimization of interference. The effect of test section length is also examined. (Author).
Publisher:
ISBN:
Category : Aerofoils
Languages : en
Pages : 46
Book Description
The lift interference was calculated for a porous wall wind tunnel by a modified method of block cyclic reduction. This efficient, numerical method has indicated its accuracy by comparison with other available analytical and approximate solutions. A scheme is introduced to search for optimum wall configurations. The lift interference computed for an NACA 64-series finite airfoil in some optimum configurations has demonstrated the achievement of minimization of interference. The effect of test section length is also examined. (Author).
Calculation of Interferences for a Porous Wall Wind Tunnel by the Method of Block Cyclic Reduction
Calculation of Interference for a Porous Wall Wind Tunnel by the Method of Block Cyclic Reduction
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
The lift interference was calculated for a porous wall wind tunnel by a modified method of block cyclic reduction. This efficient, numerical method has indicated its accuracy by comparison with other available analytical and approximate solutions. A scheme is introduced to search for optimum wall configurations. The lift interference computed for an NACA 64-series finite airfoil in some optimum configurations has demonstrated the achievement of minimization of interference. The effect of test section length is also examined. (Author).
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
The lift interference was calculated for a porous wall wind tunnel by a modified method of block cyclic reduction. This efficient, numerical method has indicated its accuracy by comparison with other available analytical and approximate solutions. A scheme is introduced to search for optimum wall configurations. The lift interference computed for an NACA 64-series finite airfoil in some optimum configurations has demonstrated the achievement of minimization of interference. The effect of test section length is also examined. (Author).
Calculation of Interference for a Porous Wall Wind Tunnel by the Method of Block Cyclic Reduction
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
The lift interference was calculated for a porous wall wind tunnel by a modified method of block cyclic reduction. This efficient, numerical method has indicated its accuracy by comparison with other available analytical and approximate solutions. A scheme is introduced to search for optimum wall configurations. The lift interference computed for an NACA 64-series finite airfoil in some optimum configurations has demonstrated the achievement of minimization of interference. The effect of test section length is also examined. (Author).
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
The lift interference was calculated for a porous wall wind tunnel by a modified method of block cyclic reduction. This efficient, numerical method has indicated its accuracy by comparison with other available analytical and approximate solutions. A scheme is introduced to search for optimum wall configurations. The lift interference computed for an NACA 64-series finite airfoil in some optimum configurations has demonstrated the achievement of minimization of interference. The effect of test section length is also examined. (Author).
A Numerical Method of Calculating the Boundary-induced Interference in Slotted of Perforated Wind Tunnels of Rectangular Cross Section
Author: James D. Keller
Publisher:
ISBN:
Category : Boundary layer
Languages : en
Pages : 26
Book Description
A numerical method is presented for calculating the boundary-induced interference at subsonic speeds in wind tunnels of rectangular cross section with slotted or perforated walls. The slot width or wall porosity can vary throughout the test section. The interference can be computed at any point in the test section. The model can be any configuration and can be located anywhere in the test section. Several examples are given, and comparison is made with other methods were available.
Publisher:
ISBN:
Category : Boundary layer
Languages : en
Pages : 26
Book Description
A numerical method is presented for calculating the boundary-induced interference at subsonic speeds in wind tunnels of rectangular cross section with slotted or perforated walls. The slot width or wall porosity can vary throughout the test section. The interference can be computed at any point in the test section. The model can be any configuration and can be located anywhere in the test section. Several examples are given, and comparison is made with other methods were available.
Wall Interference in Wind Tunnels with Slotted and Porous Boundaries at Subsonic Speeds
Author: Barrett Stone Baldwin
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 46
Book Description
Linearized compressible-flow analysis is applied to the study of wind-tunnel-wall interference for subsonic flow in either two-dimensional or circular test sections having slotted or porous walls. Expressions are developed for evaluating blockage and lift interference.
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 46
Book Description
Linearized compressible-flow analysis is applied to the study of wind-tunnel-wall interference for subsonic flow in either two-dimensional or circular test sections having slotted or porous walls. Expressions are developed for evaluating blockage and lift interference.
A Method for the Design of Porous-wall Wind Tunnels
Author: George M. Stokes
Publisher:
ISBN:
Category : Boundary layer
Languages : en
Pages : 60
Book Description
Publisher:
ISBN:
Category : Boundary layer
Languages : en
Pages : 60
Book Description
An Investigation of Three-dimensional Wall Interference in a Variable Porosity Transonice Wind Tunnel
Author: Travis W. Binion (Jr.)
Publisher:
ISBN:
Category : Mach number
Languages : en
Pages : 88
Book Description
Publisher:
ISBN:
Category : Mach number
Languages : en
Pages : 88
Book Description
AGARD Advisory Report
Author: North Atlantic Treaty Organization. Advisory Group for Aeronautical Research and Development
Publisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 140
Book Description
Publisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 140
Book Description
Approximation of the Spanwise Distribution of Wind-tunnel-boundary Interference on Lift of Wings in Rectangular Perforated-wall Test Sections
Author: Ray H. Wright
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 42
Book Description
An approximation method has been developed for calculating the spanwise distribution of wind-tunnel-boundary upwash interference on lift of wings in rectangular perforated-wall test sections. This method is applied to square test sections with an assumed effective permeability constant of 0.6. A problem of considerable difficulty in practical application of the method presented is the estimation of an effective permeability constant. Because of the variation of the upwash interference with Mach number and of the influence of boundary layer on the effective permeability factor, the boundary interference in a perforated-wall wind-tunnel test section at high subsonic Mach numbers is likely to be of the nature of that in an open-throat tunnel.
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 42
Book Description
An approximation method has been developed for calculating the spanwise distribution of wind-tunnel-boundary upwash interference on lift of wings in rectangular perforated-wall test sections. This method is applied to square test sections with an assumed effective permeability constant of 0.6. A problem of considerable difficulty in practical application of the method presented is the estimation of an effective permeability constant. Because of the variation of the upwash interference with Mach number and of the influence of boundary layer on the effective permeability factor, the boundary interference in a perforated-wall wind-tunnel test section at high subsonic Mach numbers is likely to be of the nature of that in an open-throat tunnel.