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The low frequency oscillation in the flow over a NACA0012 airfoil with an iced leading edgeThe unusually low frequency oscillation in the wake of an airfoil is explored experimentally as well as computationally for a NACA0012 airfoil with a glaze ice accretion at the leading edge. Experimentally, flow oscillations were observed at low frequencies that correspond to a Strouhal number of about 0.02. This occurred in the angle of attack range of 8 to 9 deg, near the onset of static stall for this airfoil. With a Navier-Stokes computation, limit-cycle oscillations in the flow and in the aerodynamic forces were also observed at low Strouhal numbers. However, the occurrence of the oscillation is found to depend on the turbulence model in use as well as the Reynolds number.
Document ID
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Zaman, K. B. M. Q.
(NASA Lewis Research Center Cleveland, OH, United States)
Potapczuk, M. G.
(NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 5, 2013
Publication Date
January 1, 1989
Subject Category
Report/Patent Number
NAS 1.15:102018
Meeting Information
Meeting: Conference on Low Reynolds Number Aerodynamics
Location: Notre Dame, IN
Country: United States
Start Date: June 5, 1989
End Date: June 7, 1989
Sponsors: Notre Dame Univ.
Accession Number
Funding Number(s)
PROJECT: RTOP 505-62-21
Distribution Limits
Work of the US Gov. Public Use Permitted.
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