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Heat transfer distributions around nominal ice accretion shapes formed on a cylinder in the NASA Lewis icing research tunnelLocal heat transfer coefficients were obtained on irregular cylindrical shapes which typify the accretion of ice on circular cylinders in cross flow. The ice shapes were grown on a 5.1 cm (2.0 in.) diameter cylinder in the NASA Lewis Icing Research Tunnel. The shapes were 2, 5, and 15 min accumulations of glaze ice and 15 min accumulation of rime ice. Heat transfer coefficients were also measured around the cylinder with no ice accretion. These icing shapes were averaged axially to obtain a nominal shape of constant cross section for the heat transfer tests. Heat transfer coefficients around the perimeter of each shape were measured with electrically heated copper strips embedded in the surface of the model which was cast from polyurethane foam. Each strip contained a thermocouple to measure the local surface temperature. The models were run in a 15.2 x 68.6 cm (6 x 27 in.) wind tunnel at several velocities. Background turbulence in the wind tunnel was less than 0.5 percent. The models were also run with a turbulence producing grid which gave about 3.5 percent turbulence at the model location with the model removed. The effect of roughness was also simulated with sand grains glued to the surface. Results are presented as Nusselt number versus angle from the stagnation line for the smooth and rough models for both high and low levels of free stream turblence. Roughness of the surface in the region prior to flow separation plays a major role in determining the heat transfer distribution.
Document ID
19840006395
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Vanfossen, G. J.
(NASA Lewis Research Center Cleveland, OH, United States)
Simoneau, R. J.
(NASA Lewis Research Center Cleveland, OH, United States)
Olsen, W. A.
(NASA Lewis Research Center Cleveland, OH, United States)
Shaw, R. J.
(NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 4, 2013
Publication Date
January 1, 1984
Subject Category
Fluid Mechanics And Heat Transfer
Report/Patent Number
NAS 1.15:83557
E-1905
NASA-TM-83557
Meeting Information
Meeting: Aerospace Sci. Meeting
Location: Reno, NV
Country: United States
Start Date: January 9, 1984
End Date: January 12, 1984
Sponsors: AIAA
Accession Number
84N14463
Funding Number(s)
PROJECT: RTOP 505-45-12
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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