Windkanal

Windkanal

The invention relates to a wind tunnel (1), in particular for aero-acoustic measuring, with closed air conduction and a free jet measuring section, whereby measures are taken to avoid or at least reduce disruptive aerodynamic oscillation. This is achieved, in accordance with the invention, by fittin...

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Hauptverfasser: HEESEN, WILHELM VON, 44575 CASTROP-RAUXEL, DE, WICKERN, GERHARD., 85080 GAIMERSHEIM, DE, WALLMANN, STEFFEN, 09119 NITZ, DE
Format: Patent
Sprache:ger
Schlagworte:
MEASURING
PHYSICS
TESTING
TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES
TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR
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creator HEESEN, WILHELM VON, 44575 CASTROP-RAUXEL, DE
WICKERN, GERHARD., 85080 GAIMERSHEIM, DE
WALLMANN, STEFFEN, 09119 NITZ, DE
description The invention relates to a wind tunnel (1), in particular for aero-acoustic measuring, with closed air conduction and a free jet measuring section, whereby measures are taken to avoid or at least reduce disruptive aerodynamic oscillation. This is achieved, in accordance with the invention, by fitting a device, in particular one or several loud speaker units (33-35), to initiate aerodynamic oscillations in opposition of phase. This system makes it possible to avoid in particular the phenomenon that occurs in wind tunnels with closed air conduction and free jet working section (so-called Göttinger type), in the form of low frequency aerodynamic oscillation which develops at certain aerodynamic speeds and is likely to generate resonance inside the tunnel.
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subjects MEASURING
PHYSICS
TESTING
TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES
TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR
title Windkanal
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