Boundary Interference In A Rectangular Wind Tunnel With Perforated Walls
Download Boundary Interference In A Rectangular Wind Tunnel With Perforated Walls full books in PDF, epub, and Kindle. Read online free Boundary Interference In A Rectangular Wind Tunnel With Perforated Walls ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Author | : C. F. Lo |
Publisher | : |
Total Pages | : 53 |
Release | : 1970 |
Genre | : |
ISBN | : |
Download Boundary Interference in a Rectangular Wind Tunnel with Perforated Walls Book in PDF, Epub and Kindle
The boundary interference at subsonic speeds is presented for rectangular wind tunnels with perforated walls. The point-matching method is used for the analysis with an equivalent homogeneous boundary condition at the perforated walls. Numerical results are given for rectangular wind tunnels having various porosities and height-to-width ratios of 1.0, 0.8, and 0.5. (Author).
Author | : Ray H. Wright |
Publisher | : |
Total Pages | : 42 |
Release | : 1968 |
Genre | : Airplanes |
ISBN | : |
Download Approximation of the Spanwise Distribution of Wind-tunnel-boundary Interference on Lift of Wings in Rectangular Perforated-wall Test Sections Book in PDF, Epub and Kindle
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.
Author | : James D. Keller |
Publisher | : |
Total Pages | : 26 |
Release | : 1971 |
Genre | : Boundary layer |
ISBN | : |
Download A Numerical Method of Calculating the Boundary-induced Interference in Slotted of Perforated Wind Tunnels of Rectangular Cross Section Book in PDF, Epub and Kindle
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.
Author | : |
Publisher | : |
Total Pages | : 37 |
Release | : 1968 |
Genre | : Airplanes |
ISBN | : |
Download Approximation of Spanwise Distribution of Wind-tunnel-boundary Interference on Lift of Wings in Rectangular Perforated-wall Test Sections [with List of References] Book in PDF, Epub and Kindle
Author | : Charles Daniel Vision |
Publisher | : |
Total Pages | : 160 |
Release | : 1996 |
Genre | : Interference (Aerodynamics) |
ISBN | : |
Download A Study of Tunnel Boundary Interference in a Perforated Wall Wind Tunnel Using a Panel Method Book in PDF, Epub and Kindle
Author | : Benferd L. Schilling |
Publisher | : |
Total Pages | : 66 |
Release | : 1970 |
Genre | : Airplanes |
ISBN | : |
Download Calculated Wind-tunnel-boundary Lift-interference Factors for Rectangular Perforated Test Sections Book in PDF, Epub and Kindle
Author | : E. M. Kraft |
Publisher | : |
Total Pages | : 74 |
Release | : 1974 |
Genre | : Short take-off and landing aircraft |
ISBN | : |
Download Analytical Study of Ventilated Wind Tunnel Boundary Interference on V/STOL Models Including Wake Curvature and Decay Effects Book in PDF, Epub and Kindle
The wind tunnel boundary interference on a V/STOL model is calculated in a rectangular test section with solid vertical walls and ventilated (perforated or slotted) horizontal walls. The interference is found by applying the small perturbation theory of an incompressible fluid to the boundary value problem. The theory uses an image method in addition to Fourier transforms with an equivalent homogeneous boundary condition on the ventilated wall. The mathematical representation of the V/STOL model accounts for the curvature and decay of the wake. The assumption of a constant wake strength produces a paradox in that the maximum value of the interference factors increases as the initial jet velocity decreases. The most significant aspect of the analysis shows that nonlinear cross-flow effects at the tunnel boundary are important in the V/STOL case, and a quasi-linear approximation to these effects is introduced into the solution providing good agreement with experimental data.
Author | : E. M. Kraft |
Publisher | : |
Total Pages | : 84 |
Release | : 1976 |
Genre | : Aerodynamics, Transonic |
ISBN | : |
Download An Integral Equation Method for Boundary Interference in a Perforated-wall Wind Tunnel at Transonic Speeds Book in PDF, Epub and Kindle
The wind tunnel boundary interference at transonic speeds on a thin airfoil in a two-dimensional perforated-wall wind tunnel was determined. The interference was found by applying an integral equation method to the nonlinear transonic small disturbance equation including embedded supersonic regions with shock waves. The kernels of the ensuing integral equation were replaced by series approximations, and the integrals were evaluated in closed form. The iterative technique used to calculate the interference from the integral equation method is shown to converge rapidly, and the computing time for the integral equation method is typically an order of magnitude less than present numerical methods. As a special case, the integral equation method for a thin airfoil in free air was also examined. It was found that the introduction of a novel influence function yields, for the first time, a self-contained integral equation for a lifting airfoil. In addition, a systematic study of the classical assumption used to simplify the integral equation shows that the integral method can provide solutions in good agreement with results from the numerical methods.
Author | : Gerald Edwin Matyk |
Publisher | : |
Total Pages | : 276 |
Release | : 1973 |
Genre | : Aerodynamics |
ISBN | : |
Download An Experimental Investigation of Boundary Interference at Subsonic Speeds in a Two-dimensional Perforated-wall Wind Tunnel Book in PDF, Epub and Kindle
Author | : Edward Michael Kraft |
Publisher | : |
Total Pages | : 118 |
Release | : 1975 |
Genre | : |
ISBN | : |
Download An Integral Equation Method for Boundary Interference in Perforated-wall Wind Tunnels at Transonic Speeds Book in PDF, Epub and Kindle