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Experimental Investigation of Unsteady Surface Pressure Characteristics on a Two-dimensional Airfoil under Turbulent Inflow Conditions

Yin, J. (1994) Experimental Investigation of Unsteady Surface Pressure Characteristics on a Two-dimensional Airfoil under Turbulent Inflow Conditions. DLR-Interner Bericht. 129-94/6, 39 S.

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Abstract

Unsteady surface pressure measurements were conducted on an isolated airfoil exposed to either low- or high turbulence inflow conditions. The tests were performed in the NUAA's (Nanjing University of Aeronautics and Astronautics in China) 3m low speed wind tunnel. The airfoil was a 1.2m chord (two dimensional) NACA 0012 standard airfoil. Measurements were taken for free stream velocities of 41m/s and 30m/s and at angles of attack of 0, 5, 10, 15 degrees. A grid was used to achieve an almost homogeneous turbulent flow field with a turbulence intensity of 5.3% and an integral length scale of 0.049m at a free stram velocity of 30m/s. Unsteady surface pressure spectra were determinded on the suction side (upper side) at positions corresponding to 8.7%, 15%, 26%, 50% and 70% of the airfoil chord as well as at a 15% position on the pressure side (lower side). The data were taken by means of flush-mounted 1/4"-diameter condenser (pressure type) microphones.

Document Type:Monograph (DLR-Interner Bericht)
Additional Information: LIDO-Berichtsjahr=1994,
Title:Experimental Investigation of Unsteady Surface Pressure Characteristics on a Two-dimensional Airfoil under Turbulent Inflow Conditions
Authors:
AuthorsInstitution or Email of Authors
Yin, J.UNSPECIFIED
Date:1994
Number of Pages:39
Status:Published
Keywords:Turbulent surface pressures, turbulent airfoil onflow
HGF - Research field:UNSPECIFIED
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:UNSPECIFIED
DLR - Program:L TT - Triebwerkstechnologien
DLR - Research theme (Project):L - Quiet Air Traffic (old)
Location: Köln-Porz , Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Institut für Entwurfsaerodynamik
Deposited By: elib DLR-Beauftragter
Deposited On:03 Apr 2006
Last Modified:27 Apr 2009 10:05

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