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CORRELATION OF AIRFOIL ICE FORMATIONS AND THEIR AERODYNAMIC EFFECTS WITH IMPINGEMENT AND FLIGHT CONDITIONS
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Abstract
An empirical equation is developed by which changes in drag coefficients due to ice formations on an NACA 65A004 airfoil may be calculated from known icing and flight conditions; this equation is then extended to include available data for other airfoils up to 15-percent thickness ratio. The correlation was obtained primarily by use of ice heights and ice angles measured on the 4-percent thick airfoil. The final equation, however, does not include the ice measurements, but relates changes in drag coefficients due to ice with the following variables: icing time, airspeed, air temperature, liquid-water content, cloud droplet-impingement efficiencies, airfoil chord, angles of attack, and leading-edge radius-of-curvature.
Changes in lift and pitching-moment coefficients due to ice oh an NACA 0011 airfoil are also related to the corresponding changes in drag coefficients; additional data on lift and pitching-moment changes due to ice are limited to the 65A004 airfoil, for which complex trends preclude a relationship within the scope of this paper.
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Citation
H.GRAY, V., "CORRELATION OF AIRFOIL ICE FORMATIONS AND THEIR AERODYNAMIC EFFECTS WITH IMPINGEMENT AND FLIGHT CONDITIONS," SAE Technical Paper 570165, 1957, https://doi.org/10.4271/570165.Also In
References
- Gray V. H. von Glahn U. Aerodynamic Effects Caused by Icing of an Unswept NACA 65A004 Airfoil Section. Prospective NACA TN
- von Glahn U. H. Gray V. H. Effect of Ice Formations on Section Drag of Swept NACA 63A-009 Airfoil with Partial-Span Leading-Edge Slat for Various Modes of Thermal Ice Protection. NACA RM E53J30 1954
- Bowden Dean T. Effect of Pneumatic De-Icers and Ice Formations on Aerodynamic Characteristics of an Airfoil. NACA TN 3564 1956
- Gray V. H. von Glahn U. Effect of Ice and Frost Formations on Drag of NACA 65 1 - 212 Airfoil for Various Modes of Thermal Ice Protection NACA TN 2962 1953
- Gray V. H. Correlations Among Ice Measurements, Impingement Rates, Icing Conditions and Drag Coefficients for an Unswept NACA 65A004 Airfoil Section. Prospective NACA TN
- Gelder T. F. Smyers W. H. von Glahn U. H. Experimental Droplet Impingement on Several Two-Dimensional Airfoils with Thickness Ratios of 6 to 16 Percent