Download Free Approximation Of The Spanwise Distribution Of Wind Tunnel Boundary Interference On Lift Of Wings In Rectangular Perforated Wall Test Sections Book in PDF and EPUB Free Download. You can read online Approximation Of The Spanwise Distribution Of Wind Tunnel Boundary Interference On Lift Of Wings In Rectangular Perforated Wall Test Sections and write the review.

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.
February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index