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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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)|
|Title:||Experimental Investigation of Unsteady Surface Pressure Characteristics on a Two-dimensional Airfoil under Turbulent Inflow Conditions|
|Number of Pages:||39|
|Keywords:||Turbulent surface pressures, turbulent airfoil onflow|
|HGF - Research field:||UNSPECIFIED|
|HGF - Program:||Aeronautics|
|HGF - Program Themes:||L - no assignement|
|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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