Author: Alvaro Toledano EscalonaPublisher:
ISBN:
Category :
Languages : en
Pages : 114
Book Description
Improvement of Subsonic Wall Corrections in an Industrial Wind Tunnel
Author: Alvaro Toledano EscalonaPublisher:
ISBN:
Category :
Languages : en
Pages : 114
Book Description
Wall Interference in Wind Tunnels with Slotted and Porous Boundaries at Subsonic Speeds
Author: Barrett Stone BaldwinPublisher:
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.
Subsonic Wind Tunnel Wall Corrections
Author: Henry Clifford GarnerPublisher:
ISBN:
Category : Wind tunnel walls
Languages : en
Pages : 704
Book Description
Diffuser Efficiency and Flow Process of Supersonic Wind Tunnels with Free Jet Test Section
Author: Rudolf HermannPublisher:
ISBN:
Category : Wind tunnels
Languages : en
Pages : 90
Book Description
In the wind tunnel arrangement under consideration, the air leaves the Laval nozzle as a free jet and is recaptured by the diffuser, which is of the convergent-divergent design. A theoretical analysis of the flow process through this type of supersonic wind tunnel is presented and the diffuser efficiency is calculated for the case of equilibrium between test chamber pressure and pressure in the nozzle exit, assuming one-dimensional, in viscous, steady flow. Using the basic equations of continuity, energy and momentum flux through a bounding surface, an exact solution of the problem is obtained, which is applicable up to Mach number infinite. One of the basic results is, that in the recapturing zone of the diffuser a transition occurs from supersonic to subsonic flow, which is followed by an acceleration in the convergent portion up to sonic velocity at the second throat. The transition is not a normal shock and involves a total pressure loss greater than that of a normal shock at the test section Mach number. A mathematical solution with supersonic velocity after the transition process has no physical existence. A comprehensive comparison of the analytical results with available experiments in supersonic wind tunnels up to Mach number 4.4 regarding diffuser efficiency and second throat area shows good agreement.
A Method for the Design of Porous-wall Wind Tunnels
Author: George M. StokesPublisher:
ISBN:
Category : Boundary layer
Languages : en
Pages : 60
Book Description
Subsonic wind tunnel wall corrections
Author: Organisation du traité de l'Atlantique nord. AGARD.Publisher:
ISBN:
Category :
Languages : en
Pages : 465
Book Description
Rectangular-wind-tunnel Blocking Corrections Using the Velocity-ratio Method
Author: Rudolph W. HenselPublisher:
ISBN:
Category : Mathematical analysis
Languages : en
Pages : 708
Book Description
Calculations of the ratios of the velocity increments at test bodies to those at the tunnel walls caused by the solid blocking of these bodies within the walls of a closed rectangular wind tunnel are presented. The boides treated include two-dimensional airfoils; small bodies of revolution; straight, untapered, finite-span wings of varying span; and swept, untapered, finite-span wings of varying span. It is shown that, after wake blocking effects have been removed , the present method furnishes semiempirical blocking corrections for most wind-tunnel models and their components. The test section proportions of the Southern California Cooperative Wind Tunnel at CIT (ratio of height to width equal to 1/square root of 2) are used in the calculations.
Subsonic Wind Tunnel Wall Corrections
Author: Henry Clifford GarnerPublisher:
ISBN:
Category : Wind tunnel walls
Languages : en
Pages : 465
Book Description
Wall Interference Correction Based on Interface Measurements in Subsonic Wind Tunnel Testing
Author: Norbert Manfred Hermann UlbrichPublisher:
ISBN:
Category : Wind tunnel walls
Languages : en
Pages : 163
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