Calculation of Interference for a Porous Wall Wind Tunnel by the Method of Block Cyclic Reduction

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 co...

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Bibliographic Details
Main Authors: Lo, C F, Glassman, H N
Format: Report
Language:English
Subjects:
AERODYNAMIC CONFIGURATIONS
AIRFOILS
BLOCK CYCLIC REDUCTION
Fluid Mechanics
INTERFERENCE
LIFT
POROUS MATERIALS
REDUCTION
Test Facilities, Equipment and Methods
WALLS
WIND TUNNELS
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Summary: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. Prepared in cooperation with ARO, Inc., Tullahoma, Tenn., Rept. no. ARO-PWT-TR-75-63.