Experimental Investigation of the Use of Slotted Test-section Walls to Reduce Wall Interference for High-lift-model Testing

Experimental Investigation of the Use of Slotted Test-section Walls to Reduce Wall Interference for High-lift-model Testing PDF Author: Kalman J. Grunwald
Publisher:
ISBN:
Category : Interference (Aerodynamics)
Languages : en
Pages : 84

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NASA Technical Note

NASA Technical Note PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 536

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Scientific and Technical Aerospace Reports

Scientific and Technical Aerospace Reports PDF Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 464

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NASA Technical Memorandum

NASA Technical Memorandum PDF Author:
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ISBN:
Category : Aeronautics
Languages : en
Pages : 64

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Monthly Catalog of United States Government Publications

Monthly Catalog of United States Government Publications PDF Author: United States. Superintendent of Documents
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ISBN:
Category : Government publications
Languages : en
Pages : 1666

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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.

NASA Technical Paper

NASA Technical Paper PDF Author:
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ISBN:
Category : Science
Languages : en
Pages : 88

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NASA Technical Paper

NASA Technical Paper PDF Author: United States. National Aeronautics and Space Administration
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ISBN:
Category : Aeronautics
Languages : en
Pages : 350

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Analytical Study of Ventilated Wind Tunnel Boundary Interference on V/STOL Models Including Wake Curvature and Decay Effects

Analytical Study of Ventilated Wind Tunnel Boundary Interference on V/STOL Models Including Wake Curvature and Decay Effects PDF Author: E. M. Kraft
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ISBN:
Category : Short take-off and landing aircraft
Languages : en
Pages : 74

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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.

Applied Mechanics Reviews

Applied Mechanics Reviews PDF Author:
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ISBN:
Category : Mechanics, Applied
Languages : en
Pages : 300

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Report

Report PDF Author:
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ISBN:
Category : Aeronautics
Languages : en
Pages : 430

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